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Old 12-30-2004, 01:12 PM   #1 (permalink)
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300 six buildup...need help

I built 240's and 300's for stock cars from '89-'91...If you can get the fuelie head from the same source as the split manifolds,grab it.It has a modern swirl chamber and much better exhaust ports...The split manifolds made 17 horsepower as I recall...Can't remember exactly how much the head was good for but it was substantial...For your application,I don't see a big gain from a cam change.I would use the headpipe from the same vehicle the manifolds came from(it should already have an H pipe),if it will fit.A large single exhaust from the H pipe back would work really well and I don't think duals would help much,if any at all...Let us know how it works out...

[ This Message was edited by: Nedcrane on 12/31/04 1:20am ]
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Old 12-30-2004, 03:39 PM   #2 (permalink)
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300 six buildup...need help

http://cliffordperformanceshop.com/ As far as I'm concerned, they have the BEST cams for inlines. Period. They've been making them going on forever.

A 252 or 260 Compcams High Energy might be right down your alley, I'd go for the 260 myself with your 4.10s for towing.

NOTE: Just noticed CLifford is getting a little slim on the number of grinds they have for the 240-300, they used to have WAY more. You can always call and ask them what they recommend, as again, they know these engines better then anybody.

I've used their parts to build a couple 300s, 200s, 250s (Fords), and 250 and 292 Chevys. All turned out VERY GOOD. They're more expensive then most cam places though...
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Old 12-30-2004, 05:37 PM   #3 (permalink)
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300 six buildup...need help

Taken a look at FordSix?
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Old 12-31-2004, 11:15 AM   #4 (permalink)
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300 six buildup...need help

Quote:
On 2004-12-30 14:00, chilly460 wrote:
Thanks Ned, I'll look into the EFI head. I was aware of the better chamber...plus it bumps compression a bit as well.

Anything to look out for when installing an EFI head on the carb engine block? Carb manifolds bolt up to the head ok?
As I recall the carb intake bolted up with the EFI split exhaust manifold with no modification...We were using a stock ford intake,as per class rules...I vaguely remember something about bolt lengths but I don't think it was a problem...It's been 14 years since I messed with these things,so the small details escape me now...Keep me posted on your progress,you'll probably be surprised how much torque it will make,but don't expect much over 4500 RPM...I always wanted to build a wild 300 six.They have a 3.98 stroke,and the 240 rod is 6.79 long...Imagine an almost 4 inch stroke with a 1.7 rod ratio and some serious head work...Small block heads have the same bore spacing and two can be welded together to make one head...Sorry for rambling on,keep me posted...
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Old 12-31-2004, 04:36 PM   #5 (permalink)
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300 six buildup...need help

Check out the inline six forum at fordtrucks.com. Col Flashman has a really nice 300 build up.
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Old 12-31-2004, 08:24 PM   #6 (permalink)
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300 six buildup...need help

the 300 six can be made to produce lots of power, I built one years ago for a 65 econoline. I used the comp HE 260, offy dual port mani and a holley 600, ported head and split header it flat out hauled ass. They make tons of low end torque as well so even if you go a bit more cam they still pull good low end.

Find a used holley projection or you can buy GM tbi's that will work on just about any car, it will make more power and torque than a carb can and fuel economy will go up as well
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Old 12-31-2004, 08:27 PM   #7 (permalink)
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300 six buildup...need help

the 300 six can be made to produce lots of power, I built one years ago for a 65 econoline. I used the comp HE 260, offy dual port mani and a holley 600, ported head and split header it flat out hauled ass. They make tons of low end torque as well so even if you go a bit more cam they still pull good low end.

Find a used holley projection or you can buy GM tbi's that will work on just about any car, it will make more power and torque than a carb can and fuel economy will go up as well
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Old 12-31-2004, 10:37 PM   #8 (permalink)
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300 six buildup...need help

hey chilly460, if you can save the old 300 untill around may 05, as i am thinking about swapping a 300 in my fairmont. that is when i will be back in VA for work. i work in shenandoah national park.
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