Originally Posted by WadeMetzinger
I ended up purchasing one from RCR and they are very very well built. I didn't have time modify/fabricate a standard big block one and glad I didn't now that I have this one.

RCR Metal Fabrication


They seem to take care making it work well. From their web site:
If you have an Aluminum Block with cross bolted main caps please let me know, it requires a special motor mount plate to clear the front cross bolt on the passenger side of the block