SM420 4 Speed 7:1 Chevy Transmission

[pvienneau]

Pulled a 4 speed from our 49 build that could be rebuilt, however, I found one local from a newer truck that was running fine when pulled. Is 300 a good price for a 4 speed 7:1 or is this a bad idea. I want to keep the truck with its 4 speed and with a straight newer 6 (full compression) and need advice if I should grab this tranny now or wait maybe get the engine and tranny together? Any infor about this tranny would be greatly appreciated.