I have a 1968 FJ40. Need to replace carburetor. Current is the 1 barrel Keester. No rebuild kits available, amd the carburetor no longer in production. The recommneded Weber is $500 and requires 1F conversion kit and recommends electric fuel pump. My question is: what wpuld it take, or is it possible to use carburetor that fits 1969 FJ40?