[Maxthe222]

Hey gang,

Let me start off by saying yes, I know that I won't get very far with the stock 6x4's, I understand the limitations, and that getting D-Port Edlebrock or KRE aluminium heads would be more effective. Well, with the cost to ship those over to Australia at the moment, how long it'd take for me to get them, and how I would like to retain the relatively stock look, I'd like to hold onto the 6x4's for now.

So they're bare metal, cleaned up heads right now, and I'm starting from the ground up. It's a factory bore 1979 400 PWH block. Likely just going to 0.030 for now. Looking at possibly flat top 0.030 KB or Sealed Power piston heads. Considering keeping the original Armasteel rods, and definitely keeping the original 17059263 Rochester Quadrajet. Keeping factory intake as well, will look into porting options for it.

In terms of components for the heads, such as valves, lifters, springs etc, what are some good combinations to consider? I've read that you can port the heads out from 93cc to something like 87cc, does anyone have feedback on what the limitations there are? I think I can expect that my best case scenario will end up something like 9.5:1 in terms of compression.

Is there also some sort of resource out there I can use if I need to prod the head guy in the right direction for porting? Like porting specs or measurements? They'd likely have next to no experience with Pontiac heads down here.