ok, this might be a dumb question but I'll ask anyways... what is the back of the block bolt pattern match with? Ive heard from some its a chevy pattern and others swear its a ford smallblock pattern. the one I have is a 89 dodge with a NV4500 combo. thinking of droping it in my chevy camper van 4x4 project and was wondering if it would bolt up to a NV4500 and HD transfercase from a 94 chevrolet truck. anyone know? thanks for your help.