physically yes they fit.
performance wise. Not very good.
The ports and valves are small.
IF you are only wanting a tow truck motor that won't rev past 4500 rpm you
can build a real stump puller with those heads.
But you'd be better off selling them
anfd buying a new set of VORTEC heads from Chevrolet.for about $500/pair
Ok everyone. Thanks for the info.
I will put them on a 350 CI
Reason is the 1/2 ton I plan to install them on has 271 (273?) gears
in the rear. With a 3 speed automatic tranny 2nd revs out to approx 90
mph. Never sees 4500 rpm and not needed.
I hope I get a real stump puller as "Im Right" suggested
Flat pistons in a 350, with 76cc heads will give you about 9:1
compression ratio, and about 8:1 with dished pistons. 64 cc heads
will up that at least a full point, so I would expect you will have
very high compression ratio with 58cc heads. This is about the size
of the old 283 heads, I think. Do I hear detonation? I don't know
where you will find gas to run in it.
I used 69cc heads from a 307 on my dished 350. That and a High Energy
252 cam added about 10% to my 78 Jimmy's gas milage.
Colorado Springs, CO
My advice may be worth what you paid for it.
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