I have a 85 350 bored 30 over flat top pistons 12to 1 cam the heads i have on it have been milled I want to put a set of Vortec heads on it. what do I have to do to the heads to make them work? will my cam work or do i need a new one? if i do what should I get?

 

Welcome aboard thirdgen.org.

I assume by "12 to 1" you mean compression ratio. The cam doesn't determine static CR.

What induction system do you have? Carb? TPI? ???

The main things you have to consider with Vortec heads are: intake manifold type (needs to be Vortec-specific); self-aligning rocker arms (unless you convert to guide plates); and how much lift you have at the valve (Vortec heads are limited to ~.440-.480" lift, and the valve springs aren't up to aftermarket cams).

Assuming you have a carburetor, and a cam with a powerband somewhere between 1500-6500 RPMs, this kit is a great deal, good for .575" lift at the valve:

http://sdparts.com/details/scoggin-d...ter/sd8060raag

 

I have a edelbrock 700 carb and a performer rpm intake.

 

For Vortec heads?

 

I don't know if they will match up. I put them on around 2002 when I got the car. the bottom end was already done when I got the car I finished off the intake and carb.

 

If you don't know if it's a Vortec intake manifold, then it's about a 99.9999992% probability you don't have a Vortec intake manifold.

And, therefore, I stand by the kit I linked.