I was at the Machine shop earlier this week. He's putting a 350 Olds together right now. The owner had a brand new set of Perf RPM's he brought in with the heart shaped combustion chambers. Looked just like mine with different chambers as far as I could tell. Same 77CC volume I believe.I've been trying to find someone who has a set of the new chamber heads that reportedly came out last year but to no avail.
https://www.jegs.com/i/Edelbrock/35...eF-I6iMHn6prsEYW6a3Gj7GhcJdAKg6MaAt1iEALw_wcB
Hutch