68 Pontiac 400

[transamguy79]

i have a pontiac 400 out of a 68 gto and it was bored 30 over. its just the block and i want to build it up from scratch. but i can't decide on whether to build it up as is or bore it our a hair more and get the 461 stroker kit. either way im getting the kre heads but i want to get as much power out of it as possible. which direction should i take?

[sporter]

If the bores check out ok, I'd leave it alone and add the stroker kit. You can get the pistons in a standard 455 bore and a '68 block is plenty tough to handle a big stroker crank. I'd go with a 4.5" crank and have some fun with a 487ci engine.You could even run a 4.75" crank for 514ci, but it would be tougher on the block.

[Lowend]

If you are buying a rotating assy anyways, might as well go stroker. It's gonna cost about the same and nothing makes torque like an extra .25" of stroke

[Ishmael]

leave the bore and stroke it. BTW transamguy and sporter, you should post up some pictures of your rides.

[transamguy79]

ok. sounds like the vote is stroke it. now with stroking it the kre heads and edelbrock victor intake along with a custom .691 lift cam and 1050 holley dominator carb. what trans and converter should i run? im figuring 600+ hp.

[critter]

Manual or Automatic?

For an auto at that power level I'd say a 4L80e or one of the newer six speed versions of it.

Manual? Tremec TKO.