I've spend the past two hours searching here and a couple of other sites, and am not finding a clearly defined answer.

I have a 93 Trans Am with LS1 front brakes. I have centerline Telstar 15x4 front wheels (1 5/8 backspacing) and 15x8 rears with 5.5" backspacing. The rears are FINE on the strange. I test fit the fronts tonight after installing my SLP Line lock, and am glad I did. They did not clear by any means. These wheels were originally purchased with the intent of running them on my black car, but I've since sold that car so naturally they're going to be used on the car this thread is based around.

All of the grinding related stuff I've seen has been related to the REAR calipers. What I NEED to know is if the front calipers are able to be ground down for clearance from the Telstar 15x4's, or if it's absolutely necessary to run a 5/16" spacer and 2.5" underhead length studs. I would prefer not to run a spacer for a couple of reasons, mainly being keeping the tires tucked in a bit, but if I must, then I must.

So, can anyone shed some light on this?? Again, this is for the FRONT WHEELS ONLY, my rears are fine (LT1 brakes still).

 

you will need ARP 3.25" Studs (25$/5studs from summit)
Pick up Mr.gasket 5/16 spacer (12$)
your choice of Lugs w/ shank (xx$)

I put 15x3.5 draglites on my LT1 with LS1 Brakes..
http://s22.photobucket.com/albums/b345/bow94z/welds/

 

These aren't the same as the Weld's though. They use an acorn lug nut and have a different width/offset.

I ordered 2 1/2 inch studs because I did some measuring earlier, but have started some "exploratory" grinding. Looks like I need to remove about 1/4" from the caliper corner, but I"m going to test fit continually as I go and stop when I feel safe.

 

I wouldnt run spacers with those wheels there already really close to the edge of the fender line with the offset, with a spacer they would be sticking out.

 

I'm working on the answer. I'm putting together a detailed write-up for this fix. I've found that some of the welds around the inside edge of the wheel are HUGE and have taken those town just a tad, and have almost clearanced the front driver caliper with an angle grinder, and haven't taken much meat off of the caliper yet. I do have a set of longer studs and 5/16 spacers coming tomorrow though, as a compare/contrast type of thing. More to come.

 

Noteworthy progression: I have one wheel (the only wheel/side I've been working on) spinning freely now. Just need to clearance a tiny bit more for a safety buffer. It takes some grinding on the brakes, but it's not that bad. Essentially the corner of the caliper has to be rounded, like the rears. But......This is with no spacer, no longer studs, just the Telstar and stock studs with acorn lug nuts.

I'm going to do a full write-up with pics and comparison with the 5/16" spacers all mounted up. figure this could be very useful information for those on a budget or not looking to run longer studs (for ease of swapping back and forth from track to street wheels).