Mustang88LXKid

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Sure my s/n on AIM is mustang88lxkid I would be happy to answer anymore questions you have. <IMG src=smileys/smiley2.gif border="0"> I know quiet a bit about stroker kits because right now I am rebuilding a 351W and 408 stroker kit<IMG src=smileys/smiley3.gif border="0">.</P>

yardbird

I love my 347 I used a dss girdle on my block to make it stronger.Some companies make a piston where the piston ring doesnt intersect the piston pin i think coast high performance is one of them.That will help with oil consumption.You would like the 347 too but the 331 may be better for longevity and still make great power.

makarovboy

A 347 is nothing but a stroked 306. A 306 block is .030 over, which is nothing but a cleanup bore. Everyone that mentioned a stroker kit is correct, it's the added stroke that adds the inches. A shorter piston is required to keep them from coming out the top of the block.

I would not consider running anything larger than a 347 on a 302 block, but there are a ton of people with 347's on stock 86-95 blocks, some with boost. These blocks are weaker than the older 289-302 blocks, especially in the number 1 main area, where they are known to crack. But availability and expense is a problem with old ones. Notching for rod bolt clearance is time consuming, but doesn't weaken the block if done with care, after all, it's done every day, and there are lots of 450+ hp 347's out there. A stroked 302 is a torque monster, lots of power without the engine damaging high rpm's.

cobraman

get a stroker..<edited><editID>cobraman</editID><editDate>38025.0626851852</editDate></edited>

cobraman

i would go with the 351w block,<edited><editID>cobraman</editID><editDate>38025.0631828704</editDate></edited>

hotrodman

i was bored with 302s so i got a ,<IMG src=smileys/smiley2.gif border="0">351W LOTS OF COMBOS YOU CAN GO WITH..

86lx

if you are going to spend that kind of money you should at least get a sportsman block,if you are running a auto you could probably get away with a stock block,if you run a 5 sp.with that big *** flywheel and clutch rotating with a 50 oz. balance way too much rotating weight too much harmonics, do a internal balance.i've cracked several stock blocks with a 430 hp 306 but i rev6500-6700 i did a custom balance on my new stock block with my engine builder,I put on an aluminum flywheel we used the 28 oz. weight put on a 50 oz. fluidamper drilled crank put mallory metal to bring some balance internal it worked great, i now have 10,000 very hard miles on that shortblock have had no problems since.if it breaks again i will get a better block.</P>

makarovboy

You hit it exactly 86lx, they aren't a dart block, but they hold up pretty well considering they were designed for 225hp (yeah, I know, more on some cobra's). By the way, have you ever picked up a torque converter full of tranny fluid? Not exactly light.

86lx

converter is heavy,for some reason the auto just dont put the stress on the crank like a 5 speed my buddy ran7200 rpm with a stock block with an auto and did it for a few years.

TheGmKiller331

Going 60 over isnt that bad my 331 is 60 over and it still runs 170 in 90+ weather in the summer.Its not a big deal as long as your cooling system can handle it.I never personally count the boring into the cubic inches i guess i have 339 if i did.</P>


Go 60 over if you dont mind not being able to rebuild that block again.And as we all know 302 blocks are a dime a dozen.</P>