I know this sounds like a silly question but im pretty sure the vacuum can shouldn't be making contact with the head. This is a new hei distributor with vacuum advance ( obviously ) it was installed by the machine shop that did the rebuild but i never paid that much attention to it at the time but once i got it put back in and ready to wire it became pretty obvious. Dont see how i could've moved it by lowering it in car. Im hesitant to move it because they had it running on an engine run stand to break in new camshaft so im assuming timing is correct. Any suggestions?