Pirate Jacks disc brake conversion kits

RON REAGLE said

I'm looking at Pirate Jacks for a disc brake conversion for my 68 with 4" bolt pattern wheels and 7/16 studs ( I don't want to convert to 4-1/2" bolt pattern and lose "the look" the centerlines on it give the car)
Has anyone used their kits and are you happy with them? Is there another kit out there that you can retain the 4" pattern and 7/16" studs? Most of the ones I can find upgrade you to 4-1/2" bolt pattern with 1/2" studs.

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Avoid them, and call Dr Diff instead. I helped a buddy try and install them on his GM convertible. They bolted on with some issues on alignment, fit and then we found out they sent the wrong power booster bracket. They looked good on paper, but don't live up to claims or even function properly.

Customer service was good for the first few calls for help and resolution, but quickly degraded to adversarial and unhelpful.

His brakes now pull when he stops (4 wheel discs with a distribution block), and there is no resolution in sight. He is now looking to switch over to Wilwood brakes.