Well, the wheels (in my head) are spinning again. I'm thinking about selling the ZL1 block and going with something bigger, maybe a 4.5 bore and a little more stroke. I'm not really looking to make more H.P. so much as bringing the peak H.P. down in the RPM range and picking up more Tq. I think this would give me more longevity and wouldn't have to work the motor as hard. The only bad thing is that ZL1 has kind of a "cool" factor to it, at least for me, and I would go to a iron block because of the $$$ factor. (I shouldn't have went to the track last night)