2 bolt main w/ stud kit - how much power can it take?

[Joe_Rocket]

I was just wondering if I really need a 4 bolt main bottom end? or will the 2 bolt be strong enough? Below explains what I have now, and where I want to go with it.

I put together a mild 350 small block chevy several years ago for my 69 Camaro. It has a 2 bolt main with an aftermarket stud kit, TRW forged flat tops, stock crank, stock rods with ARP bolts & polished beams. The top end is an Isky 270 Mega cam, mildly ported stock heads and a Performer RPM intake.

I'd like to swap to some aluminum heads, a roller cam, and perhaps a different intake. And just how much can a two bolt main handle?

Any recommendations on retro fit roller cams? Should I keep the bottom end, or sell the whole motor and start from scratch?



My overall goal is to get over 400 hp and be streetable. If I start from scratch, I'd consider a stroker small block.

Thanks, in advance.