Small or Big Block Chevrolet Moroso Rotor & Scroll Dry Sump Oil Pump

Before installing your pump, be sure you have the proper Moroso components to go with it. Using our matched components will ensure a simple, yet professional installation.
MOUNTING
The Moroso Dry Sump Oil Pump is designed to fit either 90° V-6, small or big block Chevrolets, and the only difference is the mounting holes. You can see that there are two sets of slotted holes on the mounting bracket, which attaches the pump to the engine block.
Before installing the pump on a small block Chevrolet install the bushing with the 3/8” I.D. into mounting bracket #8. When installing the pump on big block Chevrolets use the 7/16” I.D. bushing. This bushing is marked #7 on the exploded view. The pump mounts on the driver’s side of the engine from the two mounting holes near the side of the timing chain cover. To attach the pump to the small block or 90° V-6 Chevrolet use two 3/8-16 X 1 ½” bolts and washers. For installation on a big block Chevrolet, follow the above instructions substituting 7/16”-14 bolts for the 3/8”-16 bolts called out above.
OIL LINE ROUTING
Now that the pump is installed on the engine, you are ready to add fittings and lines. On Moroso Rotor & Scroll dry sump oil pumps, the inlets are on the bottom and the outlets are on top. Both inlet and outlet are tapped for –10 AN fitting. For –12 AN oil lines, use a –10 AN to –12 AN fitting. Starting at the front (pulley end) of the pump, the first upper and lower holes are for the front scavenges section. The bottom hole, which is the inlet, should be attached to a line coming from the front pickup in the oil pan. The top hole, which is the outlet, should be attached to a line going to an inlet on the dry sump tank.

Source