Its a 1980 chevy c10, that im wanting to be a daily driver again but have more power than stock. tires size is 255/70r/15. I dont know stall speed. It has a TH350 behind it but havent dug into the trans to know. and as far as gear ratios go, i havent messed with those either. Ive had the truck since i was 16 and drove it everyday to and from school. now, yes i am only 21 now. but still, its been 4 years and i have no idea what im doing still..