disk brake kit

Motopsycho said

The 9-10 drum doesn't matter because all thats being changed they are referring to 13 inch rims 9 inch brakes but yes lets make a kit that works not 1/2 assed I am going to try a rally rim or a spacer I am just test fitting at this time cars not tore down we will see

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Sure about that? Because they never even mention 13" rims as an option with this kit, so, it would be easier just to say they only fit 14" rims. Except as you've shown they don't fit all 14" rims.

Pretty much all of the kits are BBP kits that either have been drilled for 5x4" or a dual pattern. Most of them have the wrong wheel stud diameter too (1/2" instead of 7/16"). That has to be an economic decision, I'd bet there just isn't enough demand to justify a true SBP disk kit that would only work on SBP A-bodies. People that want stock won't convert to it anyway, and most folks that are willing to modify the car will just upgrade to BBP anyway. Doesn't leave a whole lot of demand.