I parted out 73 chevy for 7 1/2 western plow for my 85 1/2 ton, but am wondering what front springs to use. I have 3/4 ton camper special springs in rear (9 leaf), but I know 2 leaf in front need to go. What should I put in? I could use 3 leaf from 73 , but never drove truck (trans gone), not sure what shape they are in. If I buy new, should I get 3 or 5 leaf? Any hints on how much I might need to level the front with the big springs I have in rear? How about axles? 85 has 3.23 open, 73 has 3.08 posi with 12-bolt rear. Take posi units and put 3.42 gears on them? I never had plow before, so any input would be appreciated. All I need to plow is my own driveway, 300 feet long. Drivetrain is '72 350 with 700r4.