Hi
Wondering if anyone could shed some light on suspected air in brakes on my hot rod.Built a 32 Ford roadster which has 4 wheel disk brakes with a GM Brake booster which is fitted underneath the drivers seat.the brakes work ok but I feel there is too much travel in the pedal and I suspect air in the system.I have bleed the lines several times but it dos'nt seem to improve the problem.Does anyone have any clues or is it difficult to remove air from master cylinders positioned under the floor.

Thanks
P.S Booster,master cylinder and brake cylinders have all been proffesionally overhauled