The Edelbrock carburetor is super easy to modify with basic rod and jet changes. I've done it many many times because they seem to run on the lean side. The plate used on a spread bore manifold is no problem either its only an 1/8th inch thick between 2 thin gaskets and it works very well. This set up is fine unless you want originality. In my opinion though the Q jet works better and properly set up they rock. I've bought a lot of cars that had the Edelbrock carb on them. I think this is because of the issues Qjets can have but they are all fixable. It just seems easier to buy a new carburetor. Long story but if you have a good Q jet i'd use it.