When I put the 292 in my 55 I will have have a few choices for a carb and will eliminate the Holley teapot so it will either be the 56 merc Carter or a 57 intake with a modern carb,I prefer mechanical secondaries and the Merc Carter 4 bbl is vacumn so does anyone know if I can take parts from a GM version (which I should have somewhere in the shed) and convert it as I doubt the secondary diaphram is readily available and cheap.   I will most likely use a 57 intake and modern carb but if I want a old look might consider the carter and was wondering if anyone used that carb and how did they work and are they any better then the teapot and can I get parts to rebuild it.

Butchering up everything I can get my hands on in Dayton Ohio