come on guys... engine pro info needed

How can it have a 350 crank? A 400 has larger main bearings. Whatever, a good set of any heads will work. Whatever gives you the compression ratio you're after with your pistons.

For a decent answer, a lot depends on what you're going to do with the engine. A street engine for a pickup would be built different than an engine for a hot rod Vega or other light car.

Al

Thay make specail thick bearing inserts for this as it was a popular mod once. You sue 350 crank and rods with 400 pistons. The engine is now internally balanced so you have to shuck the 400 flexplate or flywheel and dampner too and get 350 parts for them.

I do agree here on this with AL, how you plan to use and feed it determines this. Also if you plan to burn 87 octane you are going to need to keep CR low and/or retard spark a lot too.

----------------- TheSnoMan.com

You can get 350 HP or so with about a good 265 to 270 duration cam,

1.94 heads a good intake and maybe 9.5 or so to one CR and at least 89 octane too. I would kinda avoid 2.02 heads because most have soft valves and seat and will not last long with unleaded gas if you run it hard.

----------------- TheSnoMan.com

What kind of sreetability are you looking for ? If you want it to be a driver car, go with a mild cam, 1.94 or 2.02 heads, but have the hard seats and new valves put in if they are older lead fuel heads. If you want it to really run, go with aftermarket heads Dart or AFR etc... Also what pistons does it have ? If you need pistons go with flattops and make your compression with the heads. Also make sure the heads are drilled for the steam holes or you'll crack the block and be done. You can run higher compression with flat tops than you can with domes when using pump gas. It all has to do with flame travel and burn. You can also make the compression with the cam. I'm running the opposite combo 350 block 400 crank .030 over 383 with Dart heads Eagle Rods and Crank, with a 320 duration cam with 292 @ .050 it's a great combo but poor mileage so ... It all depends on what you want to use it for. If totally street try to use injection TPI or TBI...

P.S. Don't forget steam holes in the heads.....

I am not a fan of the lt1.. I had one and when it broke it costed 3 X what a normal engine would.. I am going with a 355, dished pistons, 10-1 compression aftermarket dart heads, th400 with 3000 stall, and cam will be decided later...intake a torquer intake 750 (vacuum ) If the car doesn't run

LOL I know someone with a Honda civic with almost 10,000 in the engine... it'll almost turn a mid 13... The stock z28 camaro in the 80's will run low to mid 14's with very little work they will run high 13' low 14's Also the LT1 is nothing more than a 350 same block, crank everything. You are probably thinking of LS1 With the engine you are building and good rear gears get it to hook and you should se at least low 13's or better... You could go with a 600 or 650... a 750 is way overkill for that engine... I'm running a 650 double pumper on my 383 w/Dart heads killer cam etc... Sounds like it'll be a good runner when you are done keep us updated when it's finished...