Re: Popping noise need help!!!!
Carb may be running lean at higher speeds, could very easily be a minor adjustment to remedy. If your not sure how to do this you can always go to a shop and have them adjust carb as they increase rpm's. (AFR, air to fuel ratio) is probably weak, needs more juice. Did you put a timing light on it after Dist. install?
1970-LS5, #28- Fathom Blue,TH400, original motor car.
1970- NOM, 496, M21, #48 Forest Green.
1972- Malibu, 350. TH350- original motor car, #43 Gulf Green.