thanks for the anecdotes and info. I think this 305 has got to, but I'll run it until I can find a suitable big block. I've got my heart set on a 366. I like the big GMC V6s but I think they're probably too hard to find in the suburbs of a metropolitan area - I dont have too many fields from whence to poach old iron:). My guess is that the 366 would be the historically correct for a big block in this vehicle, and its meant for truck applications so I would bet it's pretty tough. Pakrat you're right about 53moneypit's post, that's what got me self-conscious about my somewhat late, V8 powered monstrosity in this world of elegant six cylinder vehicles.