Originally Posted By 440Jim
I have heard the Indy block may have interference issues with some headers as the oil pan rail (mounting surface) is a little wider.


I had this problem with TTI headers and a Indy block. I had a 3/8" header flange welded onto the TTI header flange to space the header away from the motor. It still needed some dinging on the tubes to clear.

1974 Roadrunner

1967 Charger