A powerglide is a great transmission. I used to swap out the 2 speeds to 3 speeds back in the day (70's):laughing: . I don't know how many original 60's C2's I F*ck upped back then. We also ran powerglides in dirt track cars. Anyway, you can build a pretty strong PG. Just remember your first gear is approximately a 1.74:1 ratio. If you are making lots of power, it can give you a good launch, particularly with a good stall on the converter..