340 No low end power

id look at the timing first like others have stated.it sounds like it could use alot more initial.the 3" exhaust wont hurt low end as much as you think,and there are better intakes,but something else is the culprit i think.for example i live at 4200ft and the 340 in my dart wears a tunnel ram and 3" exhaust......however it spins em at a light stab.