LA Block/Magnum Heads

Hyd roller the same/more as a solid roller swap.Yes on the AMC lifters. I would go with a mild flat tappet. Stock Magnum heads need 1110 Hughes springs,matching retainers. That good for .530 lift safely. A great move,would be to have the valve guides cut down. It's cheap,usually. Gonna need a cam,[email protected] ,about .525-.550 lift. Best of luck.