pmajor9

Here is a 1972 240Z Series III schematic. It has been reliable for me. I have added a small map at the bottom that partially traces the path from the ignition switch to some major components. (I did a lot of work making it large to aid in distinguishing colors.) Anything related to automatic transmission or air conditioning has been faded out. The 20A fuse for the defroster circuit is a small distance to the right of the fuse box. I've found at least one inconsistency on my car: the yellow/black leading from the windshield washer tank does NOT change color after coming through the firewall. I'm doing some stuff with battery disconnected so haven't tested that path beyond that point yet. I couldn't resist adding a pic of my baby. 1696333995_roxborough2.tif

I won't be modifying any of the body, but need a spare that fits the existing '72 spare tire well. (Should this be a different thread?) My car has dual ventilated disc brakes all around and the current wheel and tire are wheel: 16x7.0 4X114.3 bolt pattern. The tire is a 205/55 R16. The overall diameter of this combination is 632mm (24.44") and 205mm section width. The spare well won't accept anything greater than 165mm section width. So. . . I've figured the spare should be a wheel: 15x6.5, 4x114.3 (or 15x6.0, 15x5.5, etc...) and tire: 165/75 R15 . The overall diameter of this combination is 629mm, or only 3mm smaller than what I am running. The R15 is necessary to clear the brake. So here comes the fun part. My current wheel has 0 offset. The spare wheels I can find have offsets of 35mm or more and that raises the possibility of hitting the brake caliper. Some smaller positive offset may work but how much I don't know Can anyone point me toward finding a candidate wheel? I would be seriously grateful.