I have been experiencing the typical hard start after the engine has warmed up problem. I have a '57 Skyliner with a rebuilt 292 with a 4 barrel Autolite carb and after a drive, if I shut it off and try to restart after a few minutes, it takes quite a few cranks to get it running again. I've read alot of posts on this problem and one solution is to use a phenolic spacer under the carb to decrease heat transfer to the carb. I currently use a 1/2" aluminum spacer with a vacuum port to the PCV valve. Does anyone know of a similar phenolic spacer compatible with my carb that has that vacuum port?