Originally posted by donsrods
Earlier heads, like '70-'71's are available, and breath much better, and have smaller chambers for better compression.

Bump up the compression to something like 9 to 1, put in a mild hydraulic cam, a dual plane aluminum intake, and about 700-800 cfms worth of carb, plus some free flowing exhaust, and you are going to have a great street package. With the light rear end of that pickup, traction will be minimal anyways. Something around 3:50 to 3:70 would be right on the edge.

Good luck..............
The D3VE-A2A heads can be made to work with some valve bowl blending on the intake and exhaust valves, and also some exhaust port work. Also, with flat top pistons your D3VE heads will give you about 9:1 compressioon ratio, which would be fine for your intended build.

The downside to the D3Ve heads is the valve train, which is limited in a high performance build. Fortunately for you, this valve train can accomodate a mild cam up to, say .525" lift. So unless you intend to go really big and popwerful later, your heads can be made to wrk fine (even the early heads benfit from the same port work).

This advice comes from someone that sells the early style heads.

Paul