I am rewiring an "original" 228 gmc and I have bought a poor man's harness from American Classic. After eight hours of study it is good with three exceptions:
1 it has no ground wire from the voltage regulator mounting screw to the generator
2 It does not have a "cross over" wirw from the headlight switch to the amp gage,from the lead of the headlight switch to the voltage regulator {bat}.
3 no wiring from the thermosat to thermosat gage.
All of the above creates no major issue but when I really looked at the thermosat gage I noticed that both posts on that gage have a metal bracket which covers them upon which it tells you that one post goes to eng. and one to ign. The same for the fuel gage. The question is are these brackets on the back of the gagues due to the difference in polarity of gmc vs chevy? Are these brackets on gmc gagues only or has anyone seen them on chevy? Long winded Hope you understand the question. As a side question I have a one an half inch by one quarter inch tin tag wired to the engine block, near the bell housinf with the number 7 stamped on it, is this an inspection tag/