Just in case you are interested, I attached a few pix to show you a hard line installation on a 261. The set up would be the same as yours. I used a TransDapt spin-on adapter. This one is also set for a bypass filter, but you can just eliminate the fittings for that if you don't want one. The rear fitting as a 1/8" NPT port for the oil gauge.
I included a few pictures of a 261 in the shop and one with a sister engine in my '57. One has the Frantz bypass located on the front of the intake manifold, the other on the rear.
Incidentally, the full flow/bypass combination design has Jerry's fingerprints all over it. I can't take any credit.
