Depending on how much you want to delete or add to the electrical system, I would gut the wiring from the fire truck stuff and see what you have. Mine is so simple that it's easy to make your own wiring/harness.
1957 Chevrolet 5700 LCF 283 SM420 2 speed rear, 1955 IH 300U T/A, 1978 Corvette 350 auto, 1978 Yamaha DT175, 1999 Harley Davidson Softail Fat Boy
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