Im new to this forum thing but it looks like there might be some good advice help here. I have a 73 C10 2wd. 350 with a TH350 trans. Little bit of motor work some time ago, and tranny has had work a few times over.. Now with a 1ton torque converter and shift kit. Iv had the problem a few times before and it happed to me again today.. Spun the input shaft on the tranny i am quite sure again. I always have wanted a 4 speed manual in the truck. I am wondering what kind of 4 spd's like to get put in these trucks? And how hard is the work? Thank you for any advice.