Looking for a set of over the frame headers for a sbc in a 34 Ford Coupe. Need 1-3/4" primaries, 3" or 3-1/2" collectors. Sanderson has some but only with 1-5/8" primaries that are too small. Have a 30 over 400 sbc that made 600hp on the dyno getting set up to race in a gas class. Can anyone help me with this? Does anyone know who might make these? Thanks guys.