Just an idea since you have your old wiring harness ends it looks like they could still be used if you like to salvage them. Either use butt connectors  I prefer uninsulated connectors and heat shrink. For the 90 degree ends that attach to the sending units coil and the fender solenoid if you need to replace them you can use uninsulated ring terminals a heat shrink. For easy wire tracing routing and for original looking some what you can find any striped tracer wire needed to completely rebuild what you have there. For the under dash harness I might suggest using a delphi 4 gang fuse box. These fuse boxes can inter lock with more fuse blocks as well as 5 pin relay housings. Another option for a fuse box is one i saw on amazon for like 30 bucks and its like a 22 circuit and includes spots for flasher and hazard relay. Looks like a remake of an 80 Gm fuse block. Because later trucks had separate connector for hazzard relay. For your under dash connectors that go to headlight switch wiper can be re used. Or replaced they now offer several options. Forgot to mention shercomarine has alot of different wire and parts.

Last edited by True74yamaha (8/28/2020 12:31 AM)

The big ring terminal goes to the bolt which secures the ground cable to the block from the battery.  Otherwise its right.  Don't put anything on that stator terminal.  If you ground it the alternator won't charge.  I found that out the hard way, and we didn't have a fancy internet machine back then to tell us where stuff went.  It took an old school mechanic to look at it and ask "why did you ground the stator"?  Ah, thank God for Mr. Short!