so a little update, got the TH400 put in and got it back on the road, ne wxhaust and a few other goodies. Runs really good, but pulling is another story. Took a 20' enclosed trailer to pick up a load of stuff for a friend 200 miles away and was not impressed at all! It did ok but not much better than a mild built 350 would do, it actually strugled a few times up the steep hills and that **** just wont fly.
Bad news is the lift is just gonna have to wait again, the good news is I am going back to a mark IV block .060 over, 049 heads, 4.25 crank, 6.385 rods, and a mechanical fuel pump. If you missed that it adds up to a 496 stroker. Also gonna bump the compression up to adjust for living at 6000', this should solve my towing issues! Also figured out I actually have 4.56 gears already in it, kinda sucks cause it turns about 3200 at 75 with the 33's on it, so should calm it down to 2800rpm when the 37's get on there and put around 2500rpm when towing at 65mph. So got lucky with all that part I guess, Hope to get the new engine built and put in around thaksgiving.
DID I MENTION IT A 496!!! OH YEAH PURDY HAPPY BOUT THAT!!