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Old 01-09-2009, 09:16 PM   #46 (permalink)
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Re: 351 Clevor

check all over the net and...... junk..... then check out...... and were are you now ? ----- some hard thinking due, yes?
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Old 01-10-2009, 06:21 AM   #47 (permalink)
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Re: 351 Clevor

Procomp heads? Ah heck. You already have good Cleveland heads and a Cleveland block right. Why would you put not so good Procomp heads on it and then go to the trouble of putting the good Cleveland heads on the Windsor block? This doesn't make a whole lot of sense to me.

Honestly the best, simplest, and most cost effective thing you could do would be to use your closed chamber 4 bbl heads on your Cleveland block. Get a 393 stroker kit if you can afford it. Keep it to 357 cubes if you can't. Buy a good 4 bbl Cleveland intake manifold. No need for spacers, or conversion intakes. Get your 4 bbl heads ported and put in a big solid flat tappet cam. You'll make a bunch of hp.

Then sell the Procomp heads and leave your 351W block for another project. For the 351W, either buy some more Cleveland heads if you want to pursue the Clevor deal or better yet just sell the Clevor pistons and buy some good aftermarket 351W heads.

IMO, I think you are making your buildups uneccessarily complicated and expensive for little if any gain over something much simpler.

I do dig the idea of a Clevor, but I thought (assumed) you had two sets of Cleveland heads, one for your 351C block and one for your 351W block. I just assumed that was why you wanted to put the 351C heads on your Windsor block.

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Old 01-10-2009, 11:39 AM   #48 (permalink)
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Re: 351 Clevor

Thats just it the 4v heads i have are for a clevor already with the holes drilled and then plugged. or i would use them on a cleveland. Thats why i am putting them on the 351W I have three full sets of cleveland heads us 2v heads, procomp, and my clevor 4v closed chamber ones.
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Old 01-10-2009, 03:53 PM   #49 (permalink)
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Re: 351 Clevor

So I looked on probe website and could not find the 393 clevor pistons. Do you know the part number? Thanks
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Old 01-10-2009, 04:55 PM   #50 (permalink)
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Re: 351 Clevor

Quote:
Originally Posted by 69fstback View Post
Well my compresion is based on my head cc and the pistons are the same ones kb117 sells except they are forged (mine i mean) So its around 12.
OK, so if we go by published figures we're talking about 63cc heads, 6+cc dome pistons, +/- .005 deck clearance, and a .040 thick gasket. Are you going to CC the heads, pistons?

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I have been all over the interent trying to get all the facts straight on the clevor. I beleive you have to drill two holes in the 351W block.
There is a bunch of info out there and hard to absorb all at once. It's best to take it in slowly and ask many questions. Look over the image below and tell me where you think the holes have to be drilled in the block. What head gaskets are you going to use?

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Originally Posted by 69fstback View Post
So Ya the intake is the only think I want to do an actually intake not the plates.
What kind of fabrication skills or tools do you have access to?
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351 Clevor-351wblockclevorgasket.jpg  
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Last edited by BrianS; 01-10-2009 at 05:09 PM.
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Old 01-10-2009, 05:18 PM   #51 (permalink)
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Re: 351 Clevor

I am going to have the heads cc' but as on now i am going to go by published cc. The heads do have larger valves and have been cleaned up mildly.

I have a image of the drilling of the block it seems like you only need 3 holes on each side. One is 5/16 the other two are 1/2 inch holes.

I plan on using fel pro 1021 head gasket.

I am pretty good at fabercating and have a good set up i believe.
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Old 01-10-2009, 09:36 PM   #52 (permalink)
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Re: 351 Clevor

So I came to my final decesion. Its a 357 cube motor 12.1 compression I ran a cam quest with stock head flow numbers and it came out to 516hp@6500 467hp@5500. That was with the solid flat tappet P/N 35-641-5. This is about the numbers i was looking for and i can only run these test with comp cams. So i think there can be more power had with a differnt company cam. You guys are the best. I will just keep asking questions as i go. Tomorow i am taking a trip to the machince shop to pick up my block. (he even drilled the six holes for me even though I didnt ask him)
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Old 01-11-2009, 06:29 AM   #53 (permalink)
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Re: 351 Clevor

Here's the spec's on that cam:

300/314 degrees advertised
265/276 degrees @ 0.050"
Gross lift with windsor rockers (1.6) .600/.593"
With 1.73 Cleveland rockers I think it'd be .649/641"
106 degree lobe separation angle.

COMP Cams 35-641-5 - COMP Cams Oval Track Camshafts - summitracing.com

That cam is too big unless you plan to run a 5000 rpm stall converter, 4.56 gears and maybe 7500 rpm max rpm. Add to that the fact that the higher ratio Cleveland style rockers are going to make the effective duration at the valve even greater. Way too big, IMO.

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Old 01-11-2009, 06:39 AM   #54 (permalink)
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Re: 351 Clevor

Ya i also thought it was to big but that is what this cam quest came up with so i threw it out there. I know the cam will make or break my build so i am gonig to run it down one more time on excatly what i have no lieing here.

357W/C with 12.1 compression
4v heads with bigger valves undercut 3angle valve job. Just some polishing work not really any porting
blue racer roller rockers
I went ahead and bought better rods. 4340 i beams 5.956
Stock crank
Intake is either going to be edelbrocks ported to match 4v heads (they say it can be done easy if not im sending it back) I also saw 88gt has his intake on ebay.
750double pumper with choke milled off proform main body and aluminum bowls
windage tray
with a c-4 with a stall 3800-4200
gears in a 9in either 4.11 or 4.56
Going in a car that weighs about 3200 with me in it.
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Old 01-11-2009, 06:58 AM   #55 (permalink)
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Re: 351 Clevor

This is my last try.port exit dimensions on the Edelbrock Clevor intake are 1.42" x 2.07".Port entry dimensions on a stock 4 bbl Cleveland head are 1.75" x 2.50".So there's a lot of difference. And this speaks nothing about the different locations of the port. I don't doubt that you can flare out the exit on the Edelbrock intake to match the Factory 351C 4bbl heads and make them physically mate up. Good idea? paulie
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Old 01-11-2009, 08:40 AM   #56 (permalink)
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Re: 351 Clevor

when the budget controls the build, also controls the performance. old saying , you get what you pay for. low HP parts get you low HP. took a look at that e bay intake, looks like a 2V ported. whats the cross sect. area 1 3/4 inch in from the flange?

Last edited by DanH; 01-11-2009 at 08:49 AM.
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Old 01-11-2009, 12:24 PM   #57 (permalink)
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Re: 351 Clevor

Please don't ruin another intake by port matching. Dan and Paulie are making the case I stated earlier. The Track Boss is a 2V intake. It's about port location so you can't simply turn a 2V intake into a 4V intake by enlarging the exit, which is what it appears they did with the Track Boss 4V.
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Old 01-11-2009, 01:21 PM   #58 (permalink)
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Re: 351 Clevor

Ok i am just going to pony up the $490 for the CHI one then you guys all said it.
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Old 01-11-2009, 01:44 PM   #59 (permalink)
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Re: 351 Clevor

I didn't say that. CHI makes a manifold for 4bbl heads with port stuffers. So you are going to add port stuffers to the heads now?

Why don't you just convert your 4bbl heads back so they'll work on the Cleveland block?

paulie
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Old 01-11-2009, 02:19 PM   #60 (permalink)
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Re: 351 Clevor

Quote:
Originally Posted by 69fstback View Post
I am going to have the heads cc' but as on now i am going to go by published cc. The heads do have larger valves and have been cleaned up mildly.

I have a image of the drilling of the block it seems like you only need 3 holes on each side. One is 5/16 the other two are 1/2 inch holes.

I plan on using fel pro 1021 head gasket.

I am pretty good at fabercating and have a good set up i believe.
Larger than 2.19/1.71? These heads really don't need larger valves.

So we're all on the same page, is this where the holes were drilled?

http://www.themustangshop.com/howtos/clevor/gaskets.jpg

The 1021 is for SVO 5.0/5.8. That should work OK but a Cleveland gasket will work too. You'll need to put some valve reliefs at the top of the cylinder.
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