you have a magnum engine with the old LA front cover correct?
yes that cam will work..just wont use the oil holes in the cam
there are no oil passages in the block to heads on the magnum engine,so it wont use the holes in the cam
some early magnum blocks are drilled for the LA style oiling but are blocked at the deck by the magnum head
you should be able to run the mech fuel pump with it now also just need the ecentric and washer/bolt from a pre mag engine
the magnum cam bolt/washer will not work on that cam,so you need a pre-mag bolt/washer/ecentric/timeing gear sprokets
as long as you have the oil thru roller lifters and hollow rods its good to go
I have used a cam bearing with a full oil groove with a cam and no oil holes also
sold it right away so dont have feed back on how well that worked