i have a 74 360 it's bored .060 over a little bigger cam i don't have the specs on right now if needed i can get them 1 3/4" headers and a holley 500 atop the stock intake ok i took it to the exhaust shop yesterday and they reccomended me running the 3" exhaust now that it is ran it seems to have lost "bottom end" tremendously would anyone have any thoughts on the matter without draining my wallet? would a jet change be in order? if so any recomendations? any info is surely appreciated.