Darrell,
I always had fun prior to 2008 when I ran the MP Stage VI heads. They make funny faces when I tell them that. The only reason I stopped running them (they are for the backup motor now), is I didn't want to put alcohol (ethanol or methanol) on the epoxy in those ports. So I bought some used Indy 440-1 heads that flow roughly the same ( at .700").

1993 Daytona, 5.50 at 130mph (1/8) 1.19 sixty ft (PG). Link to 572 B1 - Part 1