I have a Rochester 1351-7354 2-barrel carb off of a 1979 Mercruiser 120hp. The carb sat for a longtime and was bogging down while accelerating. I currently have the carb off of the engine because I just replaced the manifold and riser. Since it's already off I'd like go ahead and have it taken care of correctly before I put it all back together.<br /><br />If there is a later model 'upgrade' of somesort I'd like to know about it if I could gain a bit of performance. If not, would I be better off to have this one rebuilt or go with one of the aftermarket rebuilds (Sierra)?