I learned something. The only Autolites I have are '64 and later and when I had earlier cars with them I put a Holley or Carter on. Youthful enthusiasm I guess.KULTULZ said:The early 4100/2100 uses HOLLEY jets until 1963 then went to FORD specific. If the jet has just the orifice size stamped, it is HOLLEY. If the orifice size has F behind it, it is FORD specific.
PONY CARBURETORS supposedly has a good selection of the later FORD specific jets.