choke block off plate.

so i put the 2 barrel intake and 318 carb on the dd.made a block off plate for the gapimg hole in the ex man.well bought gasket material for this cost 17.00 a sheet.the car burns it up quickly then has a big *** ex leak.made the plate out of aluminum.even used that all metal epoxylittle better, 3 days it lasted.any suggestions????:angry7: