so im looking at building a 4wd hotrod. the body is a mid 40's M-37 the frame is already shortened and Z'd i have a DRW axle for the rear, and a late 70's D44 for the front i plan on using both of them with 37 x 12.5's on each corner. both axles have 4:10 ratio. any thing i should be looking at before i pull the trigger on the axle swap? rear end is designed for early 60's truck arm suspension.