360 magnum and 727 issues.

Was that shift kit always in that trans behind the other engines? Was anything changed in the transmission when it was placed behind this engine?
I am thinking you have a pressure problem in the transmission. High pressure is pushing the converter forward. Not really a converter problem.
Had it in my old Volare for a few years behind a different 360 magnum was fine. Its same trans, shift kit and converter before in went in the D150. Ive put probably 10-12 727 transmissions together with this same shift kit some of mine and some for friends all work good. This motor i did a refresh on this motor last spring so kinda sucks. Guess I'll throw it back together and get a guage on it maybe something stuck in valve body or broke.