we can't get a spacer cause of air cleaner hits the bolts that hold the hood scoop on its a long story but anywat we are going to try a drop down air cleaner base now,,,, would any of this cause the 4 bbl not to kick in it is a vac sec and we adjusted the float and it has gas in it but we can get it to kick in we have change the spring to the smallest ( 1620 ) maybe ??? ohhh man its really hot under there everything is hot the carb is hot too what do you think ???