I had a little backfire and the wires connected to the fuel injectors got a little burnt, should I switch them out ? And if so how do I do it ?

 

As long as the wires are still flexible, don't feel brittle, and the insulation isn't bubbled or melted, they're probably fine. If you need to replace them, I'd trace them back 5-6" and cut them. Then splice in some replacements using solder and shrink wrap. You can find them all over the junkyards in any GM vehicle that used TBI, like 88-94 fullsize trucks and vans, Pre-LT1 Caprices, etc.

 

Alright thanks for the response ! Hopefully it runs been working on it all summer.