Advice for 351w or 408w with what i have so far... - Ford Muscle Forums : Ford Muscle Cars Tech Forum
 
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post #1 of 6 (permalink) Old 02-07-2018, 02:05 PM Thread Starter
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Advice for 351w or 408w with what i have so far...

Hello ?

Busy doing my project and have made every mistake possible so far... Currently converting my 67 i6 stang coupe to fullfill its destiny of being "my " car here in the uk.

I have a list of stuff ive bought and would like some advice on the best bits to keep and bits to get rid of.

Id like a solid street demon that runs on pump gas, has reasonable manners and is just a really good mix of awsome fun power and usabilaty. Not a daily driver but reasonable gearing (3.25/3.5??) so motirway miles are bearable.

I need a new 9" rear
I have a 69 v8 c4 transmission to rebuild to suit .
Ive installed lowered 1" springs
Ive put koni adjustables on all corners. Set fronts at 1 turn from full soft. Havent done rears yet.
New 16:1 manual box
225 /17 wheels
Ive got a big block rad
Installed an export brace.

This is the part about my question....

I bought a load of bits.... Was thinking of a stroker 408 but undecided on whether to keep engine as is .

I have a rebuilt 351w .030 over. Rebored, reground crank, new rods, hypereuretic flat top pistons. Dont know the cam. It came with procomp 210cc heads 60cc chambers.
Ive a weiland stealth intake
770 street avenger ultra carb.
Afr 205 heads 58cc chmbers.
Shorty headers.
No exhaust yet.

I know the heads wont work with flat tops due to the small chambers... And are probably a bit big for a 351... But its got all new internals.

Opinions on wether to bite the bullet and stroke it, would i get a better suited combination from what ive got??

Everything costs a fortune to get over here in the uk so i am going to stop making impulsive puchases till i have a few opinions....

Thanks for your advice ?

Also
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post #2 of 6 (permalink) Old 02-07-2018, 02:14 PM Thread Starter
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The ? Randomly made an appearance and my names paul not also!?
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post #3 of 6 (permalink) Old 02-08-2018, 07:40 AM
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Re: Advice for 351w or 408w with what i have so far...

I'd build the 408. The additional torque of the 408 will also allow you to use a more highway friendly gear. I would go with a 3.25 over the 3.50. When driving 100 miles each way back and forth to college in my mustang (the one in my sig) I used a 3.25 with a 4-speed. This was with a 306. I felt it was a great gear for the highway, and still had plenty of acceleration in town. Your auto trans will rev higher at highway speeds than a 4-speed due to converter slippage. Depending on the amount of highway miles, I'd be torn between 3.08 and 3.25 with your setup. (no overdrive)

You need to fix the compression, anyway. May as well do it with a 408! You should be able to get pistons dished enough to work with the 58cc AFR heads. I don't like the Chinese made Pro-Comps. The AFRs are MUCH higher quality, and will run circles around them!

A well build 408 is an amazing powerplant. You will NOT be disappointed!!!
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post #4 of 6 (permalink) Old 02-08-2018, 08:44 AM
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Re: Advice for 351w or 408w with what i have so far...

You're looking for about a 30cc dish to give you a workable compression ratio that will be happy with your existing camshaft in a 408.

Summit Racing has some affordable DSS brand pistons with a 31 cc dish that should play nicely with your combo. Some less than $500.

When shopping for crankshafts, pay attention to the balance. Some are neutral balance, and will require a neutral balance flywheel and harmonic dampner. Some use the factory 28 oz-in imbalance. Or, you can call someone like www.fordstrokers.com and get a full kit from them that will work with the parts you have.

https://www.summitracing.com/search/...8%2B4294861287

Good Luck!
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post #5 of 6 (permalink) Old 02-09-2018, 09:09 AM
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Re: Advice for 351w or 408w with what i have so far...

I have had the 351 that was close to what you have now. I did not have the 205 heads. You can have some one set you up with the right cam and intake system and get some pretty good performance from the 351.But if you want to haul balls the stroker would be the way to go.Your talking about 100hp more. you can set up the 408 to be mild mannered but still haul the mail. If you go 408 you do not have to go radical on the cam so you have a great cruiser but still perform very well.There is no replacement for displacement. You want more torque on the street.you get more with the higher displacement. Roger
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post #6 of 6 (permalink) Old 02-09-2018, 03:22 PM Thread Starter
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Thanks for the advice, think ill email a few companies about my combination... So i guess the 58cc chamber size was the wrong way to go... Live and learn!? 3.25 gears with a street going 408 that can still release the beast is maybe the way to go... Thanks for your advice guys.
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