proform carb anyone?

hello there and thankyou for the help! ive rebuilt the holley, its been to a pal of mines and he says its just bad! dunno if he just down on the carb or holley in general,it doesnt seem to keep in tune, heard the proform has extra features, kinda like it took a holley and improved it.? i had a real bad overheat problem when there was a problem in heater matrix, wondering if that caused it or there a crack or somthing, this proform< didnt realise chineese?> could be a quick fix or waste of $ couldnt run any worse! sorry i didnt realise was chineese,i did a google search and seems dealers stateside selling,i didnt think till after PRO comp etc....i recently bought a new sump and some edelbrock walve covers..........tiny little sticker saying made in china...stuff hard to get here in uk,i do buy stateside but you never know where its made