My dad taught me how to read schematics, if fact he had me rewire a my first car 66 vw bug that i bought for $50, I converted it from 6 volt to 12 volt , i put a 1973 type 3 pancake motor in it with headers and a cam, i also turned it into a baja, but doing that has helped me throughout the years, the rewiring part cause over the years some of the chevy trucks i have had was bad, being that i replaced every wire on the damn thing except for the one going over for the heater core it was a 73 chevy Cheyenne super w/454 it was a real gas hog. I had to use a service manual for the 442 i had , come to find out it had 2 power cables going to the starter, one for extra juice coming through something else i forget how, but it made a helle difference on the 445 big block in the winter. now my tremors are so bad i cant hardly put a screwdriver on a screw