55 was the only 265 V-8 without the filter boss built into the block at the driver's side of the bellhousing area. The 1/8" pipe plug at the end of the camshaft oil gallery above the timing cover was the oil source for a bypass canister filter just like the 6 cylinders ran in 55. I used that gallery for a pressure switch on a 327 race engine that came on at 20 PSI and flashed a big red light at the driver. If it didn't reset after a turn, it was time to shut the engine down. We saved a couple of crankshafts that way when the bearings got worn. Even on the later model engines that the gallery didn't get drilled, the plug was still there. I would (carefully) drill a hole into the oil gallery to provide pressure to the high pressure idiot light switch.
Jerry


"It is better to be silent and be thought a fool than to speak and eliminate all doubt!" - Abraham Lincoln
Cringe and wail in fear, Eloi- - - - -we Morlocks are on the hunt!
There is nothing noble in being superior to your fellow man; true nobility is being superior to your former self. - Ernest Hemingway
Love your enemies and drive 'em nuts!