I think not building a Magnum because it’s a Magnum is stupid. Same for the LA. The Magnum’s lack of a head oiling hood is small potato’s but an extra expense with the appropriate rockers & pushrods needed for the Magnum block and LA head combo.
I e done the opposite, I've put magnum heads on a couple of LA engines over the years.
The Magnums had some differences vs the LA series but much was still the same.
One " advantage" quoted on the Magnums was metric rings. I don't see it as an advantage.
