I was wondering if it is possible to put out 300+HP by modifying the engine, and is it also possible to put a NOS kit or turbocharger in a Series II engine?

yes to both

You're not too far from www.intense-racing.com

If you have the budget, you'll be there. If you don't build your trans in advance, save some in the budget for later.

yes, i beleave Todds last dyno had him a 378HP(at the wheels), it this correct?

Yes, Intense racing has alot of what I need. But, is there a specific kind of turbocharger for L67 engines?

i beleave there is a kit out there for the L67, but it eliminates the Supercharger (guts it and uses it as a UIM) other wise i beleave its all custom

Do you think it would be alot better just to go with the Nitrious kit then the turbocharger because I don't want to eliminate the supercharger.

We aren't very big on putting nitrous on a motor around here, or a turbo instead of a SC. GM gave us SC'* and we kinda like them.

That'* not to say that you can't make more power or have more fun other ways. It'* simply a little more risky from a club perspective.

Nitrous over Turbo? No way. Nitrous over SC? Depends on what you want. Both have their advantages.

Why not go Turbo/SC? Dual boost has been done before. Starting way back in the 50'* as I recall. And it'* been done to a 3800 as well.

A smaller pulley, exhaust work, cold air intake, PCM, and rockers and you're over 300hp (crank).