LS1/C5 Caliper Questions

[ScotI]

I hear they are the 'same' as in they should interchange but that the C5 calipers actually have a wider width. I don't know if the width is soley from the 'cooling-fins' or if it's the caliper itself thats wider, or the C5 bracketry.

I've been told that C5 calipers won't fit under TT2's. I tried these wheels out on our 02 Trans Am & they cleared the LS1 caliper w/about 7/16" to spare.

I'm just wondering if I could use the LS1 caliper on a C5 brake conversion instead of the wider C5 caliper in order to be able to use the TT2's (I already have these wheels & don't want to have to buy another set).