will a 5.3 harness work on a 6.0 ?

 

I hope so as that's what I plan to do. I think that as long as you swap the proper sensors over it should be OK. Most guys who do the 4.8/5.3 to 6.0 swap use their factory harness I think. The blocks are basically the same externally.

 

Yep.....will work fine