I think you should put the old cam back in the engine...The new cam you have is killing the engine..the 119 ex.C/L for one,and if you are running stock rockers,you need the check the lift at the intake valve........Stock intake rockers lose about .100 lift.......you are chocking the intake side for flow,,and over scavaging what little fuel thats getting in there,,,,Yes I know the car is heavy,,,But I would try the old cam,,You have,,no cost to try this.....Hope this helps.....