Please Help! I have put a 67mod 400cid in my 74 Firebird.It came from the US and had been rebuilt and tuned there in 2002. When i first put it in it ran good, but after a while it started bogging, one of the jets in the Edelbrock 750 carb was clogged. It still did burnouts effertlesly,but bogged. I rinsed the jet (and the reservoires) and it stopped bogging, but it lost its oomph... wheels dont even sqeek. It stil does a decent 0-60, but nowhere near the "beast" it was at first. Is there anything in the carb that easely breakes when opened?? Any suggestions are greately appriciated!

Ian