71 4x4 Ls1 Install - no room on engine crossmember

[M_Honcho]

I attempted to install my LS1 motor into my 1971 K10, but the engine crossmember is too narrow. I have looked on this site, but I can't find any 4x4 LS1 installs with the stock crossmember. I would prefer a bolt in crossmember - but from what I have seen, everyone make their own. I saw pacific fab has one - but their website has zero information on it.

Currently the engine is sitting in the engine bay, but the engine mounts are about an inch from the frame since the engine is squeezed between the engine cross-member. I have ground down all of the bosses and mounting areas that would be in the way.

Please let me know your experience with a LS1 install in a 4x4. Thanks