There's gotta be a nominal setting on them Frank, but I'm not sure what it is. One way to check would be to go ask for a new one, screw it all the way in, counting the turns, then set it back where it was,
Or you can just go in a turn at a time till it gets in the range you're looking for, then fine tune a 1/16 or 1/8 of a turn at a time.
ASE Certified Master Automotive Technician (well over 3 decades of experience,
'93 S10 SB,RC, Comp XR276 Hydraulic Roller, Vortec head 363, 400 + hp, built 700R4, JW 2800 stall lockup converter, 3.73 posi, disc brake, narrowed 8.8 Exploder rear, LS Camaro front discs, Cal-Trac clone traction bars, Best N/A passes to date: 8.0 in the 1/8th, 12.75@106 mph in the 1/4, gonna spray it soon...
76 Chevy Vega Drag Car, TWIN TURBO 355, TH350, (soon to be P/G), 4 link back half, narrowed 9", 3.50 gears, 29.5x10.5W ET Drags.