1965 GTO Hardtop 389 tri-power (WS), close ratio M21, 3.90 posi rear (ZK)
I'm trying to select good (low end throat) sounding mufflers for my '65 GTO. It is a 389 tri-power car with close ratio M21 and 3.90 posi-rear. When I bought it, it had two glass packs (cherry bombs), which didn't sound bad - but I obviously want to find something better. The rebuild will be mostly back to original (Crane "blueprint series" cam, with very close to original lift, duration, overlap). Again, I want the low end throat and as much rumble as I might muster from the original set-up, but I'm looking for anything wild (I guess that will be limited by my choice of original engine specs). Suggestions?