360 magnumblock?

magnum blocks oil the heads thru the pushrods and come from the factory set up for hydraulic roller cams...

LA blocks oil the heads thru number 2 and 4 cam bearing ...and feed the shaft rockers...

balancer and flexplate are relationship of there balance....magnums pistons and rods are lighter..therefore their damper and flexplate are different.

retrofit hydraulic roller lifters for a LA block are over 400.00 a set...

Oem hydraulic roller lifters for magnum block can be had for less then 100 bucks...

magnum blocks....from the factory have no provision for mechanical fuel pump..but that can be changed with the use of the LA timing chain cover and a nose extension for the cam....

biggest question...is what are you trying to do?