I have a LT1 engine I am retrofitting in my 67 and I need to know how to safely degrease the factory LT1 wiring harness. Anyone know?
Thanks

I've used 409 and simple green on plastic wrapped harnesses before with good results. I like the simple green better... WD40 might work as well, I've used it on wire connectors.

For light degreasing I have used Simple green with great results but for heavy grime or sticky stuff I found that waterless hand cleaner (GOOP) works the best without harming the wires or connectors.

hand cleaner and rags - git busy!

I use carb cleaner and brake parts cleaner to break the crusty, oily stuff up. Then a regular cleaner like Simple Green or whatever the wife has laying around.
:)

I'm thinking along the lines of WD-40 and then a mild cleaner of with simple green and rinse.

Just make sure no matter what you use it does NOT contain petroleum distillates. Petroleum distillates will weaken the plastic sheathing on the wires and could cause a very dangerous situation down the road. I would go with Simple Green or similar.

I agree with Skeeter, WD-40 will get the grease off. You can use WD-40 on electrical parts. I use it to take tar off of the floor in my c-store. Plus its made of fish oil. It won't hurt you.