Since the GMC 270 came factory with a Zenith in the military trucks....would it not be easier to find the right carb from GMC sites>>>>> I am curious as I am running a 261 with a Carter and it is a lovely piece of kit.... as recommended by Carb King....... also had a Zenith rebuilt and sealed in a Zippock bag as it was wet from bench testing....... I think it is a 228-28>>> but the barn is far away today to verify the numbers.... one day I may do a carb switch but for now the Carter YF is doing just fine.....
Bob C.....
