I have a speed demon 650 on my 302 in my 72 maverick, having trouble getting it to idle, and it dies when put in gear, I have a PVC line from the pass side, 1 large vac port in back of carb and 2 small on pass side of carb. I know the 2 small ones go to the dist. and trans. But does the PVC line go to the air cleaner or the large port in back of the carb. Any help would be awesome, thanks