After a complete overhaul of the 170 cid engine the 3-speed gave it up - input shaft broke a few teeth. So now looking to replace trans with a stronger unit. Strictly for occasional street driving - no racing or hard use. One shop suggested a C4 or T10. Guy who worked on the car mentioned a T5 he saw on Craigslist. Kind of thinking about converting to an automatic. Am I crazy, or what? Any suggestions?