I have a 17080272 which I've recently had rebuilt with cliff's parts and I still haven't been able to get it adjusted properly . If it turns out the rebuilder cannot get it fixed I would like to know if a 17057274 q/jet that was on a 400 fit my 76 350 with a mild cam (2157 E/B ) ,dual ex ,308 gears,all other is pretty much stock !