Nope. LA's oil up through the heads and into the rocker shafts. Magnums oil through the pushrods. Check your Speedmasters to make sure they oil through the head. @pittsburghracer knows for sure.
I never ran a magnum block but from reading here and Moparts some years oiled just like an LA block. But most were pushrod oiling. I don’t know what years this was offered. Every Mopar Speedmaster head that I have touched oils like an LA engine. Through the block to the shaft.
