new c20 automatic tough shifting..

[benbloom]

hi all, ive just got myself a brand new (1972) chevy c20, with an auto tranny. tranny shifts good, but when going from park to drive, it kinda bumps harshly, and then from drive getting it into park is really tough, i have to use all my strength to get the shifter into park. could this be something in between the shifter and tranny, or something internal?. the guy who sold it to me claims it was rebuilt, any idea why this would be so tough? or is the the norm with these old automatics, my other truck is a 4 speed so i have nothing to compare it too.
thanks all
Ben