I just bought a 59 GMC 1/2 ton with a 270. I want to convert it to propane like my 1955 Chev 283. I plan on installing an HEI, hardened valves and seats and an LPG converter and carb?mixer. The Carb I have is a 1 barrel. What size of LPG carb should I get? Should I switch to a clifford 4bbl or clifford dual carb intake? THis would also mean that a fenton dual exhaust manifold is necessary too. Hopefully I can increase my performace and mileage with all of this stuff.
