dr diff 4.30 is that a 3 or 4 series setup ?? its been awhile that i switched from 4.88 thought about going to 4.56 mine is a mark williams spool others have asked about 4.10s also .I just can't remember what was needed between 3 series 4 series .For others that don't know you can't respline M.W .mine built 1982 replace a axle 3years ago had info still .
thanks don

2009 418" build dan smith built new 9.96 131.82 6.23 108 1.30 60 foot best to date 9/15/09 8in 727 430 dana 2860 lb 3040 lb w driver