kzb86f150

I want to put 1 ton axles under my truck and I know for the rear it's a sterling 10.50 but I don't know if I should go with a later 70's front axle or a newer axle from 2000 and up super duties and make it a coil sprung sfs or make the brackets for leaf springs in the front and just use grade 10 bolts or weld them in? Help me plz