Looking For Engine Crossmember '68 GMC 3/4, 4x4

[Stanford]

I'm in the middle of swapping out a 305 V6 and putting in a 350. I'm staying with the original 465/NP205 combination. I have found that the engine crossmembers are different for the V6's and V8's. I was thinking of just finding some 2WD engine purches and bolting them up to the old crossmember and frame, but from the looks of things I'm not sure that the motor will sit level. If anyone as some information for me about this or has a engine crossmember that will fit, please let me know. Anything would be appreciated.

Thanks,
Aaron Stanford