I have no intention on 'cheaping out' but I need this to look as much like a street engine as possible.

A three stage weaver hanging off of the block kind of gives to much of a hint. The gear drive if it can be done quietly sounds like the ticket for me. Please keep the info coming as I am all ears. Major carnage would be a bad thing.
Info on making the gear drive quiet would be much appreciated.
Many thanks for the info thus far.