[Richard in Anaheim CA]

At the risk of offending those using either or both of those kits, I understand they both work reasonably well but they are "bypass filters". They only work after the bearings receive their oil and have a little reserve to "bypass" through the filter

The only way to have a "full flow" filter is by modifying the oil pump to prevent oil from going up into the valve chamber as designed by Ford. All the oil must be pumped through the filter from the plug on the side of the block and back into a "manifold" that you, or someone must build. Big difference.

You must built your engine "tight" so the oil doesn't leak out and lose the pressure.

Richard
Anaheim CA