1966 mustang 86 block

[Falcon79]

I went with the Duraspark system in mine, works great and never had a problem with the install. I think mustangs unlimited makes a wiring harness for the conversion if you don't want to cut your pretty three prong connectors.

 

[Monty_Brown]

I have a extra MSD 6A box that came with a project I bought I would sell for $75...it looks nice I can e-mail or text you a picture......

 

[65ShelbyClone]

Be careful with rebuilt distributors from the big auto parts shops; I've seen ones marked for the '85 5.0 come out of the box with iron gears on them.

+1. I went through that hassle with BlottoZone.

If you want to go quick and dirty, get a four-pin HEI module for $20 from the parts store. The Duraspark is bigger and better, though. I think they have an engine cranking input wire that pulls timing until the engine starts, which makes life a little easier on the starter.