I just spoke to Tobin from
www.kore3.com about a rear C5/C6 conversion kit for LT1 f-bodies that he had been developing for some time. It's not listed on the website yet (the parts just came back from the plater) but they are available for order. Until now, AFAIK this is the ONLY corvette brake upgrade available for the stock rears on our cars.
Here's a link to their drum-in-hat e-brake kit for reference:
http://www.kore3.com/proddetail.php?prod=10277
The rear brackets, like the fronts allow for upgrading to C6 Z51 or Z06 brakes. For those of you who don't know Tobin or Kore3, they rock. I did an entire Z51 brakes setup for my '81 with his kits and expertise and I couldn't be happier.
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'81 Sport Coupe 229 V6 -Junked
'93 Z28 LT1 - Parting out
"Is that a rat? No, it's just a really fat mouse."