[89turbocabmike]

Adomakin, I considered the 3.2s as I look for suitable cores for a future 3.4 twin-plug upgrade. I'd like to eliminate as much down time as possible. Talking to my machinist(Ollies, who does much of Andial's work), they say the material difference is quite evident between the two heads when you machine them. The 3.2's are much "softer" material and cut more easily. Obviously not a quantifiable answer but certainly a hint. Just thought I'd throw that in!