If the Magnum bore is the same size as the LA's bore(both virgin, both +.020,etc), you should be able to swap the magnum crank, balancer, rods and pistons over to the LA block and keep moving. Use the Magnum head bolts to bolt the Magnum heads on the LA also.
Scott B.
"I'm a self-made man... I started with nothing, and I still have most of it!"
68 360 rusty B'cuda 'vert (GO Fish)13.59@ 98.72 mph
69 340 GTS stock 14.18@ 95.60 mph
01 5.9L Ram 1500 Quad Cab 4x4
01 3.5L 300M 16.23@ 86.97 mph
