To get it back as far as we could we cut about half of thecross member out and plated it in to strenthen it back up. Where it is know the trans fits perfectly into the hole and uses the stock driveshaft and mount with the mount spaced down about .5 of an inch. Trans used is a z31 5 speed. Had to modify side of trans for starter to fit . Any questions will try to answer them. I made a two into one header pipe into a 3" magnaflow cat back , this thing sounds awsome.