[ss3011]

The bushing in the pump needs to be centered on the crankshaft centerline. I built a tool that centers the bellhousing on the crankshaft bore and then allows the pump bushing to be centered on the tool. This allows the pump to be aligned and pinned to the bellhousing . With the transmission aligned with the crankshaft, bushing wear is reduced significantly and oil leakage is way reduced. You will need an engine block , a piece of aluminum round stock about 18" long and a good machinist with a lathe. You need to pickup at least two of the back main bearing bores and machine the round stock to fit line to line in those bores. The rest of the round stock projects out the back of the block, allows you to machine it so the pump bushing is a close slip fit. Once the alignment tool is made , you bolt it into the block, install the bellhousing, then slip on the pump body with the bushing installed. The pump body can now be drilled for two small pins 180 apart so the pump stays on center with the bellhousing. The problem with those aftermarket bellhousings is it counts on the bolts to align it with the pump, but the bolt holes are clearance holes and will allow the bellhousing to runout quite a bit. Once the bellhousing is aligned and pinned to the pump, it will run on center.