Hello. I just joined this forum and was interested in this discussion.
I , too, have a 64 1/2 289 4 bbl "D" engine with a 4 speed manual trans. Mine was build in June. Last March, the engine caught fire while I was driving it. Fortunately, no one was injured. There was very little damage to the outside of the car, so I decided to have the engine rebuilt. I had the carb rebuilt rather than buy a new one. It is a C4GF-AE Autolite 4100. When I got it back, it looked great. However, when it was installed, it started to leak out of the front float bowl. The mechanic doing the engine work replaced the economizer value three times, and although the leak slowed, it was still present. (There was no leak when the carb was off of the car, only when it was on the car and the engine was running.) All the screws have been torqued correctly, and there are no visible cracks anywhere. I'm debating whether I should send it back to the company that rebuilt it (they have offered to try to fix it at no charge), or just buy a new/rebuilt one. My mechanic suspects that the intense heat of the fire put a crack somewhere in the housing. The company that rebuilt it said no; they swear that there were no cracks anywhere. So, would such a fire damage the unit? Would cracks be hidden? Is it possible to magnaflux the carb to see if there are any cracks?
Thank you, Goldie