After I fixed the last problems with my truck (76 Chevy with a 454 and auto trans)it ran well. About 2 weeks later while I was driving home from work it stalled. But before it stalled it sputtered a few times. I would try to start it and same thing. After spraying some gumout in it, it ran fine the rest of the way home. I checked it this morning and drove it around and it was fine. But again on my way home from work it did the same thing. I didn't get it home tonight. My questions are, Is this from the carb or something else? Those this happen because its alittle damper and cooler at night(Southern California)? What can I do to fixs this problem