Looking for pin out diagram for bbc changing from mefi 1 to mefi 4.

Ttt

Arizona speed gave me a print out conversion when I bought 2 connecters Having the extra connectors makes it a ton easier swapping on at a time...

I have the pinout if you need it. However, be prepared for a time consuming job. It is a real pain. It's not bad going from a 3 to a 4, but from a 1/2 to a 4 sucks. A good bit of the wires need to swap J plugs, so some will end up being way to long, and others will need to be lengthened by quite a bit. I've done a few in the past and said I would never do it again. You are dealing with a harness that is probably near 20 years old. They get brittle, stiff and just hard to work with in general.
Let me know if you want the pin out. Or, I can build you a new custom harness that will fit like a glove, is all brand new and has a braided nylon covering instead of 3 rolls of electrical tape.
Eddie

No sh*t on time consuming..... I don't know how much Eddie charges but it's got to be worth it!

Eddie how much do you charge for a new harness,i think that is really the only right way of doing it

Thanks for the info Eddie. I will contact you by phone for a new harness.