I was wondering if anyone were using these split locking header bolts: www.go-breslin.com There is a write-up about them in the June 2003 issue of CHEVY HIGH PERFORMANCE MAGAZINE. I think I'm gonna go ahead and order a set, seems like a really good idea.

 

I ordered a set of the stainless bolts a little earlier. They were a whopping $58.00 for the stainless set. They're supposedly never to need adjustment after installation, I guess that's cheap for a piece of mind. What other header bolts are being used?

 

The fact that they are 12 point bolts means that you will have to use a box end or open end wrench. Plus you will need to be able to use an allen wrench on each bolt. On an LT1 with headers (especially 1 3/4 headers) that may have you second guessing your decision to use those bolts.
I have Stage 8 bolts on my car.