Originally Posted by LA360
I have the offset as being 0.3125" for the B1's

I will have to check to see how they look on the head.


I machined my B1 adapters to the number Scott Koffel gave me. I think I wanted to locate these tightly (I get too anal sometimes) and made the 4 inner holes .260" and the outer ones .270". The adapters fit well. So I guess the numbers I received are correct. I attached a drawing of my M/T cast aluminum valve cover to B1MC adapter - note: I know I shouldn't be referencing from the center but its my drawing made for me and I like it that way....... LOL!

The numbers from Indy for the EZ heads came right off the CNC machine - they read them off to me. So unless they changed over time, they should be accurate. I made a sample spacer and sent it to the owner of the heads - will know soon how well they fit.

Attached PDF document
adapter.pdf (48 downloads)
67 Coronet 500 9.610 @ 139.20 mph
67 Coronet 500 (street car) 14.82 @ 94 mph
69 GTX (clone) - build in progress......