doing brake conversion and ran into a problem

[lasvegas69charg]

Hi. I am doing a 4 wheel disc conversion from right stuff and ran into a small problem. I was trying to mount the power booster on a already power brake car and notice the power booster bolt pattern that came with the kit doesn't match up with the stock bolt pattern. Is this normal and do I need to drill new holes for the new bolt pattern?  Thanks.

[Chryco Psycho]

Contact the MFg & see it they sent you the wrong part

[lasvegas69charg]

I called them and they said that is the right booster and that I would have to modify the bolt pattern.

[Chryco Psycho]

not cool , they should have it so it bolts up .

[HPP]

There are some manufacturers out there that use GM parts in their kits. Sounds like you may have gotten one of those.

You can modify firewall to fit the parts you have. Return the kit and look for another. Purchase a rebuilt mopar specific booster and master cylinder to replace one the ones in your kit and keep everything else.

[Chryco Psycho]

Mancini has direct bolt on kits

[Rolling_Thunder]

I agree - I would send the kit back for a full refund - then buy a rotor / caliper kit - then get a remanned mopar booster and master   

[lasvegas69charg]

It is a gm booster. The mfg said I  could use a mopar booster with a non-power master cyl. Does this make any sense?

[kab69440]

You can use a PB master. You'll need to install an adjustable line pressure valve in the line going to the resr wheels.
They specify a MB master because the line pressure to the rear on a PB master will cause rear wheel lockup when plumbed to a caliper. Hence, the line pressure adjustment valve.