Does anyone know if you can interchange a 5.7 harness and engine fuse block with any other makes? Ive been trying to get these parts but no one in the country has anything from an 85- fullsize to an 87 fullsize. If anyone has any thoughts or suggestions i would great appreciate it.

 

Kind of a broad question... What's wrong with your current harness that makes you want to replace it? If you cannot source proper used harnesses local to you, it may be easier to manually repair your current harness as opposed to trying to find one from another application as pretty much any other harness from a different application will require alteration to work properly.

 

SK~
This is a few days old, but maybe it will help you, or someone else.
I've used American Autowire harnesses. They are everything they claim to be.
https://www.americanautowire.com/sho...IZE&action=add
Last one I did was for a 1972 C20, and after yanking all the wiring out, installing new fuse block, body/cab/bed/engine module harnesses, it worked on the first try (make sure your fuel is still good, if your project has been sitting for a while!). I was impressed. There is a skillset to build, if you're not familiar with PROPER splicing techniques, and you will have to cut out a larger firewall hole for the new fuse block. Take your time, follow direction and they will not only answer the phone, but guide you through any trouble spots. I can't say enough how awesome that harness turned out!

Nomad