400 magnum distributor hold down is tight but not keeping distributor from moving while running

Yea, as jack68gts said make sure its not bottoming out on the drive shaft, a 340 dist will fit in a 440 but will bottom out, the lengths are close. 340 is 3.875", a 400 is 3.500", a 440 is 4.000"


never mind was thinking it was a 440