? about 360 crankshaft.

And check post 15 here on the big end rod width. Not sure if the Magnums just use wider rod side clearance or if the cranks have different journal widths. Easy enough to measure the journal widths on your cranks. I know the SCAT I-beams we used on an LA crank have a narrower big end than the stock LA rods, and the total side clearance goes way up, but they work fine.

Connecting Rod 'Weight'