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Author Topic:   Ford S/S Motor ideas welcomed
c21
Member
posted September 30, 2002 10:30 AM
347 stroker with gt-40p heads would be my first choice. the gt-40p head is available new from ford and they're pretty cheap. 69-70 351w heads would be my second choice. use the 1.94/1.60 chevrolet type valves in the 351w head. the 2.02's are shrouded by the combustion chamber too much and may be awfully close to touching the exhaust valve.

another good head is the 65 289 head without the thermactor bosses in the exhaust port. it has 1.78/1.45 valves and a smaller combustion chamber than the 69-70 351w. if you use the 65 289 head, don't use valves bigger than the 1.84/1.56 351w valves or they will be shrouded by the chamber too.

go get 'em.

d4490
Member
posted September 30, 2002 06:38 PM
Can you run OEM aftermatket heads (N351)?

I would get a good 347 crank kit, look in Muscle Mustang & Fast Ford magazines for some quality suppliers. I would call your cam manufacturer of choise with all the info you can give them.

Get the most compression you can get (how do they chech you?).

outlawstock17
Member
posted September 30, 2002 06:53 PM
d4490 is right on. i gathered from your post that you had to use factory stock heads, but if you can use the "N" head, do it. i use them and i'll go as far to say that they're the best unported cast iron head on the market today....ford or chevrolet. it's a 10 degree design and you can run up to .650 lift with no notches on the pistons. if you wanted to angle mill these bad boys, there's a ton of meat and the valve angle could be close to zero. they're so effiecient that ford recommends 28-30 degrees of timing.

the N351 head is the real deal boys.



c21
Member
posted October 01, 2002 09:35 AM
Putting a 3.50" stroke crank in a short block like a 302, the rod ratio and the wrist pin location in the piston is a bad set-up. The rod ratio would be to short and the pin hole in the piston would be to high (piston rocking). With the 3.40" stroke kit, you can get rod ratios that are respectable.


outlawstock17
Member
posted October 01, 2002 03:37 PM
c21, i believe that the weight difference between a 302 and a 351w is closer to 75-100lbs. a 347 stroker is a .030 over 302 block, a 3.40 stroke crank with a 5.40 rod length. i use the keith black piston. if you build one, pay special attention to the ring installation instructions with the pistons. the oil ring has to be modified a little and you MUST balance the reciprocating assembly. i've got one in my street '88 mustang GT and it'll burn rubber forever.


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