anyone in here with 6 cylinder ? i am having trouble fitting the 6 cylinder fuel pump 66 . it is time ti change with new one had the same pump since 66. the curve of the brand new pump does not fit the block and crank ? anyone had the same problem.besides i wanted to buy the replacement diaphragm fro my original fuel pump but could not find it. they were available couple years ago from NPD or mustangs unlimited looks like sold out.