Originally Posted by Wally / Montana
I wanted my spin-on filter in the original location at least so I used a Moroso much-too-expensive adapter. I bought a model which uses a GM filter but these apparently don't have bypass valves. I ended up using a NAPA filter w/bypass valve designed for a Wisconsin engine!

I think if you bought the adapter for a F*rd filter, these filters include the by-pass valve. Check that.

(Note: I first used 2 pressure gauges to check the pressure before and after the filter upon start-up.)

Spin on oil filter on my 261.
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I have the same Moroso remote set up as you. Yep, use Motorcraft FL-1A filter with the correct spin on adapter on my late model 261.

Drew