The power Glides in unknown condition right now. I'd like to just use what we have and keep the budget low. Either one I can rebuild for the price of the rebuild kit. (Last year I found out how ridiculously easy automatic are to rebuild) what I was kind of wondering is if we kept up the 307 just a little bit will we even see anything because of the 2-speed Powerglide and the freeway gears? I thought possibly because these were a dual purpose they may have put more of a lower gear in it? Kind of like it's half truck so I would figure they would at least look at some truck gears for it. Or just the normal station wagon gears that would have came in it had it been not chopped into a El Camino? LOL