I think the 10bolts came in late 77 and 78 and up.Front disks came standard on, I believe, '71 and newer 1/2 ton D44s. The '76 changed to 10 bolts from the D44 IIRC. They are both about the same strength but the '76 and earlier had the flat top knuckle which is a bonus for crossover steering. What do you mean by bumping a lot of tires off?
Sorry answered above. ^^^^^
My 77 still has the D44
, solid drivetrains even
203's are good and so are 208's (aluminum) but not for what i do
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