68 ntchbk Cuda to BB or SMB?

Mine is a 383 4 spd. Drives fine, I would recommend upgraded disc brakes on all 4 corners. If your worried about the weight 440 source has a very nice set of aluminum "stealth" heads. You go with aluminum intake, water pump etc and relocate your battery would be no problem.
Came with 383 from the factory so you know it works