I just used a first gen dodge 6bt setup and gutted the vacuum pods and pushrods, drilled and tapped, plugged the holes. There is no oil feed to the 1st gen vacuum pumps.
I used this setup on my 1994 12 valve in my 97 chevy dually. I used 1st gen dodge mounts on my swap, and the 2nd gen vacuum pump/power steering was very close to my engine mounts. in order to keep the EVO solenoid, (electronic variable orifice) on the power steering pump I needed the shorter setup. There is no need for vacuum on my 97 chevy anyways.