Thanks for the reply, Shannon. Turns out it was user error. When I went to insert the fitting into the rail end, it just sort of “fell in”. I assumed it would “bite” from the first threads, so I thought I had purchased the wrong size. Had I tried to tighten it, it would have gripped. I’m clearly new to AN fittings, newb mistake I guess.
80 Pinto w/ 2.3T, stock head and exh manifold, Ranger Roller cam, gutted/rotated upper, ported lower, 65mm TB, FMIC, T3/T4, C4 auto, 8" rear. Plans for full 3" exhaust, 80 lb injectors, 3/8" supply and return lines to a 255 lph in-tank pump running pump gas, all to be controlled with PimpX.