I used alien head bolts to attach my transmission to the engine. 700R4 to 350 SB. I cut a very short piece of a 5/16 alien wrench. Used supper glue to attach to a brake bleeder wrench and was able to break the bolts loose. I had used (anti-size) then knocked the alien piece out and glued it into one of those ratchet type wrenches, and backed out the bolts.