Wilwood floating caliper issues

[Skip Fix]

OK folks need soem input. thought for the 79 Camaro drag car I would replace the WS6 rear ratchets(new/rebuilt calipers,new rotors drilled for the 1/2 studs) with Wilwoods Metric calipers. They bolt right on BUT unlike front or rear GM calipers the outer hole for the floating bolt is not grooved for a ribber O ring to take up slack. Wilwood's hole is 0.035 larger than the bolt even a new one so the caliper can rock ALOT on that free play and the free play with the rubber and sleeve under the bolt head. WIlwood's rech guy I talked to had no clue-wnet and got an answer-"they are made for dirt cars and need the slack"-so the caliper can move all around??

So options- try and hand groove the caliper for an O ring with a Dremel, ream the hole out to use a 13/32 brass tube that is only 0.008 larger than the bolt to reduce slop, use the new ratchet calipers, or say the heck with it and get a Wilwood rear kit with Dynalites. Have the 10.75" kit going on the front.

Oh Wilwood's own pads had to had the ears on the outer pad ground down to not bottom out in the hole drilled for them in the caliper!

[Tito]

"CALIPER SLIDE PIN BOLTS, PART NUMBER 230-0619 ARE REQUIRED FOR INSTALLATION AND MUST BE ORDERED
SEPARATELY. EACH KIT CONTAINS FOUR BOLTS." (http://www.wilwood.org/fl87.pdf)

Alternatively, there are some oval-track race shops that I believe sell similar parts. Haven't used any of these myself, but reading about, they should be the "special" bolts with larger heads...

[Skip Fix]

Tito, thanks for the reference. I'll check into them. The head isn't the real problem it's the "small end" on the outboard side.

[Tito]

Whoops, somehow I didn't get that from the description. I got all mixed up with your talk of grooving and O-ringing the caliper -- I forgot about the o-rings on the outer part of the stock calipers. In theory, there shouldn't be much force trying to rotate the caliper in that direction, but I agree, it'd be nicer if it was tighter. Actually, now that I think of it, I thought I saw someone else here complaining about that issue (or maybe it was one of the other boards....).

Edit -- hee hee.. turns out I was remembering your post over at nastyZ. That makes my input pretty much useless :( I wonder if you could find any of the "stock car" pins locally and measure them first. Now I'm thinking I need new pins!

[Skip Fix]

I think one of the guys on the other board grooved and added outer O rings on the "regular" size Wilwood GM caliper.ing inner sleeve.

Actually the whole caliper can probably rock .100 with the free play in the outer and the inner O ring sleeve

[Skip Fix]

No other thoughts from the brake gurus??