15 years and he remembered THAT cam? Wow.

When I actually had my birds, I spent lots of time on line reading and I recall that the consensus was that the power gains on a poncho big block were minimal at best upgrading to headers. The best gains are to be had down stream and sounds like you are already there. Also, big blocks a misnomerfor Pontiac, as the block sizes are externally comparable. (Didn't look back in the thread to see what CID you are running, sorry.)