Thanks for the info. I also have a TH400 (it's for sale on this site). I guess from what I hear that it can handle hp even in stock trim. I got a heck of a deal on this motor but it sounds like it's really going to cost me in the long run. A Tremec 6 speed would be nice, ya know anyone that has one laying around .....cheap? I also need to beef up the rear end. Looking for a ford 9 inch too. I've had this Muncie laying around for years and thought it would be fun (like back in the 60's).