Here is my final solution to my T problem. 1/8” fip T. 1/8”x close pipe nipple. 1/8”mip to 3/16” compression adapter for the copper tube that feeds the top of the engine. The horizontal 1/8” Pipe opening is the return to the oil filter. Instead of Teflon tape or pipe dope on the adapters I fluxed the threads and tightened then soldered the joints. My 216 will probably have enough seepage without 2 more!
Larry Old man᠁Old truck᠁neither one goes very fast. All you need in life is TIME, PATIENCE and MONEY. If you are missing one component, you'll need an abundance of the others two.