Hey guys. I have sought your help in building up my 68 Firebird and your knowledge has been great thus far. I recently bought a low milege 1967 400ci engine with an Ohio Crankshafts 455ci 4030 crank, 6X Heads and forged AutoTech pistons. The motor came with a Schneider 290H cam and a Hurricane intake. The motor was originally setup for a high RPM application and I want to make it more street friendly. It's going in my 68 Firebird with a Tremec 3550 trans (low 3.27 first gear) and 3.42 reared gears. I already have a Performer RPM intake and am looking for camshaft recommendations. The car it a street car that will never see slicks, but it is only driven on once days and driven hard. I's like a real choppy muscle car idle as well, and already have a vacuum canister for added power brake support.

Thanks

Sounds like the begining of a great motor. 6x-4 or 6x-8 heads?

I had to look up the specs on the Schneider cam. If you like a choppy idle and if lower vacuum is not a problem why not run with the cam you got.
I/E @.050....Lift w/1.5 LSA
220 232 0.485/0.510 110

Did you want to run a Hydralic flatt tappet or Roller cam?

The Schneider website lists that this cam is 3000 and above RPM. I don't know much about cam specs to be honest. THanks

Does the crankshaft have three inch mains from Ohio Crankshafts or are you going to have to have them reground?

The motor is already together and has been dyno'd using a Hurricane Intake and the 290H Schnieder cam. It made the following power:

RPM TQ HP
2500 457 218
3000 461 263
3500 478 318
4000 470 358
4500 451 386
5000 414 394
Max TQ @ 3500 was 478
Max HP @5200 was 397

I just bought the motor from the guy who had it built, but he was planning the build for high RPM's and went with the Hurricane intake. The confusion thing for me is that this cam seems fairly tame, but Schneider's website states that the RPM range is 2800-6400. I am planning to use a RPM intake and want to get a good cam to match everything else. Do you guys think this cam would work with the heads and RPM intake? I also thought about retarding this cam a little to drop the RPM band as well.

Put on the RPM intake and drive it

I would have to agree with just throw it in and drive it. If for no other reason then to get a base line of what you like or don't like with that cam but the dyno looks pretty good to me. I would not be too worried about what the cam specs said. looks like a heck of a flat torq curve. The duration numbers look right in line for a street cam in a 455. I would think with a good set of headers to complement the 110 lsa you will be pretty happy with it.

Like I said I ran a very similar combo in a heavy GP and it ran great. However the same motor and heads with a different intake, q-jet and LBM ran terrible.

I would do some testing with the two intakes since you have them. My best guess would be the Hurricane intake will give you more upper RPM HP since its a single plan and the RPM would give you a little more low end torq since its a dual plan. My just end up being personal preference on which one you like. The Hurricane intake has no exhaust cross over so it may be a little more cold blooded on starts but less likely to cause a gas boil over and hard starts.