Oil Filter Leaking at First Prime of Oil Pump

The biggest thing I found is to not over tighten the bolt. I torqued it to what was printed and posted on here several times and it leaked. Finally just tightened it just over snug, enough that it won't rotate, and it sealed. Almost like tightening an oil pan or valve covers. Don't kill it. Tighter is not better in this case. Ha!
Also the center boss on mine, it's a 92' 360, was shorter than any of the 340's I've had. I stacked some machine washers the same diameter of the inner gasket to take up the difference. Could probably make your own though. I read where the oil doesn't get fully filtered if you don't fill the gap?

Carl