OK. I am trying to make an older Campag front mech work with a new SRAM crank (double).
Which Campag FD? Which shifters?
What frame is it? Some oversized seat tubes can push the FD mounting outwards by enough to make it impossible to shift onto the inner ring. Modern FDs are built to account for big tubes, but an old one would have been designed on the assumption that all seat tubes were 28.6mm dia. That's the only authentic compatibility issue, and would only occur if you have a braze on FD, obviously. If that is not the case, you're doing something wrong.
A new SRAM Rival FD can be had for £21 (less if you need a 31.8 clamp on one, as I've got one going spare), so you should be able to get up and running without too much expense.
Which Campag FD? Which shifters?
What frame is it? Some oversized seat tubes can push the FD mounting outwards by enough to make it impossible to shift onto the inner ring. Modern FDs are built to account for big tubes, but an old one would have been designed on the assumption that all seat tubes were 28.6mm dia. That's the only authentic compatibility issue, and would only occur if you have a braze on FD, obviously. If that is not the case, you're doing something wrong.
A new SRAM Rival FD can be had for £21 (less if you need a 31.8 clamp on one, as I've got one going spare), so you should be able to get up and running without too much expense.