hi I'm running an old mopar performance dizzy that I believe is for the hemi ,it has no vacume advance and has a tac drive on it also. I have no problems starting up as it fires on first try always but when I pu it in gear and try to mash it seems to be boggy also it gets terrible gas mileage on the freeway and yes I'm running a set of 4-30 gears but I should get better mpg half a tank for less than 50 miles ,any ideas maybe a recurve ?