Going through the parts room today and found a couple of these jewels. Full list is $783 but I'll let em go for what I have in them and I'll even include the shipping. They are 12 volt with 3 ports so you can swap your engine, transmission and generator all with the push of a button.
Dimensions are 11" long, 9" high (including valves), 6" deep. Weighs about 11.5 lb according to the baby scale on the cutting table.
12 Volt system requires a 25 amp breaker. Drain, fill, transfer, you can do all kinds of fun and exciting things with this setup. Valves are 1/2" FPT and the discharge/suction line is a 1/2" barb for your choice of hose (should be oil resistant at the least). Fitting can be turned around 90 degrees if you want it coming out of the left of the pump.