CDS makes one, and probably riverside, hypermax, wimer, etc.
they have a love joy coupler off the pump drive and a adapter to bolt the supply pump to the timing cover.
Ah, Big Block!
tuthill 2LE on the Injection pump gear or a 1LE off the crankshaft, from the little bit i know about it. Pulloff.com will yield you alot more pulling specific info.