Just FYI if some people on here aren't aware... the 46RH that came in V8 Dakotas, Rams, and Ram vans from about 1988-1995 (probably some other vehicles as well) is a hydraulically controled OD version of the 727 (A518) and 42RH that came in the V6 versions of said vehicles is the 904 version (A500). Those transmissions should be fairly abundant in most areas, so some people may not identify them as A518 or A500 transmissions when they really are. Basically I'm saying that the 42RH and 46RH is another name for the A500 and A518 and you may want to search by that name when trying to find an OD trans for a small block.