M1tch

I've been working on this motor all winter hoping to have it done by the spring time. If everything keeps working out i should have it completed by mid march. I have a bunch of money saved up and i'm looking for the best cam combination. Its going to be 80% street and 20% strip. Like most people with vortec heads i'm looking for a strong 400hp, hoping to run a 12.9 without any suspension upgrades

This is what i have so far...

1990-1993? 350 4 bolt main bored .060 over
Speed Pro Flat Top Pistons
Stock Rods
Federal Crankshaft
Vortec Cylinder Heads #906 *came off of a boat

Everything else is up in the air, i've done some extensive research and I can't pick on a cam.

Cam: XR276? Edelbrock 7102? Crane 119831?
Beehive springs and retainers
Edelbrock Performer
Speed Demon 750
2200 Stall?
Beefed 700r4
3.73 posi

What kind of suspension upgrades should i consider when im still wanting a steet car? Are air shocks a good choice? What about eibach?

Any input would be greatly appriciated. I'm really excited to have this project completed. I'll have pics up shortly of the motor and the car its going in!

five7kid

iTrader: (14)

Certainly not the Edelbrock - no need to downgrade to flat tappet, and it's an old unsophisticated lumpy peaky grind.

The Crane is a retrofit. It can be done, but the factory type retainer will work just as well, arguably better. Factory lifters - well, there are varying opinions on that. FWIW, I know of more than one racer who spins factory rollers to 7k (I know one uses a rev kit, I'm not sure about the other).

The XR276 is pretty mild compared to the other two. For a street car, though, that's probably the better route; although the XR282 (08-432-8, grind CS XR282HR-10) would be very street and strip friendly. I think you'd find more stall to be beneficial, at least 2500 with the XR276 and 2800 with the XR282.

Although I have nothing against beehives - very solid concept, just bought a set for the 396 in fact - I think you'd be better served having the heads modified for more valve travel. Cutting down the valve guides is a simple and smart thing to do.

Oh, and you definitely need a Performer RPM.

M1tch

Wouldnt the RPM be a little too much for the XR276?

Also, i can't decide on a fuel pressure regulator? This has been debated so many times on this forum and i can't conclude on anything. Any answerss with that?

five7kid

iTrader: (14)

Not at all. It's a superior manifold for even less cam than that.

I haven't used it myself, but the Mallory 4309 seems to work well almost all of the time. Only a few have reported problems, and I suspect it was their set-up, not the reg that caused problems. You should upgrade the LO3 in-tank pump, though.