RE: Tower 75, embarrasing question
Asmund,
Please look at the con-rod bottom end...
The bronze bushing should have a chamfer, or a bevel on its inner lip, on one side.
The side with the chamfer faces forward - toward the crank-web.
The flatter side faces the back-plate.
The side that faces the backplate will probably also have wipe-marks from contacting the back-plate.
If you still have the piston on the wrist-pin assembled, the somewhat blackened side of the piston faces the exhaust.