fan shroud part numbers 340 ??? have a fit issue

i was told its a 68/9 340 rad and shroud

thats what im running 68 340 steel wtr pump hiting on the very bottom of it no where else it will spin but it drags lightly against it
pump and rad are all the same as oem struff no problems clearing the hoses
and part numbers are listed trying to find out what i have going on maybe it a 318 rad or something