Well, I just broke my 360 block. Terminal?

can you guarantee the rear main seal will not leak? you have never seen a blowout in that spot on a small block mopar. I work with guys that could tig weld that, and weld **** like that all day every day. it is blended, preheated, backed up with a piece of copper, and welded with wire that matches the material, done in 30 minutes