I just pulled my old 4ac to put in a 20V. It has 164,XXX miles. The carb needs rebuilding, and the front and rear main seals could use replacing. But other than that, It runs great. No smoke. Have records for the servicing, from 44,XXX to 164,XXX. I'll be getting rid of it, and I'm not asking much for it. I don't add Initial D tax to my 86 stuff. But I don't have a tranny to spare.