I am doing just that on my 70 GTO which was swapped back in 2008 using a mix and match set of components. Needless to say various parts of the swap were not optimal. For instance, I used the then popular Autocraft oil pan as it was the only option available. While it cleared the crossmember when used with universal engine adapter plates, the inner tie rods hit the corners of the oil pan. I could have raised the engine a little to clear, but this would have made the already bad driveline situation even worse.
This is why I am currently in the process of collecting the parts needed to completely redo the swap, using the Holley swap system components, including the engine mounts, 302-3 oil pan, crossmember, headers, and full exhaust.
Andrew