Pirate Jacks disc brake conversion kits

RON REAGLE said

I'm not a fan of using the drum brake spindles ...

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When you throw in a random requirement like that, your choices shrink to almost nothing. True, many kits (Dr. Diff, etc) are based on 1973+ factory disk parts, including its spindle, but I doubt an earlier drum hub with 4" bolt pattern can fit that spindle. Maybe if you found proper-sized wheel bearings, but never heard of that. The 1973+ hubs are integral with the rotors. Perhaps you could re-drill a rotor for 4" bolt pattern, but never read of such.

What scares you about a drum spindle? They are forged, and never heard of one failing. Definitely prefer the 10" drum spindle since beefier and its hub uses larger wheel bearings (SET2 & SET 6). The small bearings in the 9" drum hub can fail (SET 1 & SET4). Indeed, you are better with a drum spindle than the rare disk spindle since most kits bolt to a drum spindle. The SSBC W153 kit bolts to a 10" drum spindle. I wouldn't chose that since it uses the now-rare K-H calipers and rotors. Your best choices to keep your 4" bolt wheels are Scarebird and Wilwood. Scarebird is only ~$120 for brackets and you can source calipers and rotors cheap locally (Toyota & Chevy parts).