no you won't. A gen 5.5 carb works and is easier to tune then the gen 4 carb. imo. The only thing with any of those carbs are the carb seals for the needles. You can by some from massive mods or make them out of fuel line(I use fuel line trick, after I have bought all the other engine seals including needle seals from massive mods or fx racing) At least this has been the case for me. And when you do go to massive mods to get your seals. order at least 3 sets of each and keep them on hand. trust me on this one!