Re: wiring harness
I expect the wiring harnesses should be similar. Look around at different engines. Some year they switched sides with the alternator. '70 and '71 should be pretty close, but depending on end user, there may be emission controls on one but not the other. If you can, put the vehicles next to each other and do a "what is wrong with this picture?" exercise.
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~Steven
'70 Chevy 3/4T Longhorn CST 402/400/3.56 Custom Camper
Simi Valley, CA
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