I this Swapped my upper and lower intake out, and I cant get the car to fire I know the firing order for the 5.0 is 1-3-7-2-6-5-4-8. The car will get to 500rpm then it will die out.. I got the distributor turned all the way to the left and been rotating it trying to get it to fire but I get nothing. Anyone have an idea what it could be?