As far as the heads are concerned I have EZ's and D452 headers and they fit perfect.The only issue I had was the grease fitting on the pittman arm and my aftermarket bell.I just clearanced the bell flange and replaced the fitting with a small plug. I used the Firecore wires and they dont touch the headers
The best headers I have ever used
Gus

6526269-MYBURNOUT.jpg (108 downloads)

64 Plymouth Savoy
493 Indy EZ's by Nick at Compu-Flow
5-Speed Richmond faceplate Liberty box
Dana 60