Originally Posted by markz528

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.
With those tight drill diameters and them fitting well, that is the tie breaker for me. I am going with 0.325" offset for the B1's.
Even though 0.315 and 0.281" dia holes should fit too.

1993 Daytona, 5.50 at 130mph (1/8) 1.19 sixty ft (PG). Link to 572 B1 - Part 1