Edelbrock Carb on 454 Help

[tucsonjwt]

For me, I bought a Qjet rebuild from National Carburetors for less than $200. Installed my manual choke. No fiddling with jets and rebuilds, etc. The first one came with a bad vacuum fitting thread on the baseplate, but the second replacement one was OK. Fuel economy is not as good as the original Qjet, but I kept the original for possible future quality rebuild.

I have had two 454 C20s and they both had hard hot start which a spacer did not solve. I have had a few Edelbrocks on those engines and they were never as reliable as the original Qjets. Even the Carter carbs (which Edelbrock bought out) were not very good. Also, they required a lot of cobbled modifications to make them fit all of the attaching hardware on the engine.

15 years on a GM Qjet with no spreadbore modification spacer required. Not ideal but way better than my experience with aftermarket carbs.

What year do you have? You might be better off just going back to a factory set up, but each to his or her own.