Welcome to CHR Jason:

First thought is that if you want to get into the 12 second range you may need a cam that come on in the 2500-3000 range and a 2800-3000 RPM stall converter.

I like this cam for your engine and heads - roller retrofit and about as aggressive you'd want on the street. With the 3:73 gears, those heads, a 750 and good headers, it should scare the snot out of most people at 3500 and you'll see God at about 5800 RPM.

I'd opt for the Weiand Stealth here. Others will certainly chime in.

Let us see some pictures and again, welcome to CHR.
Glenn