also keep in mind there is an ls1 in front and no weight at all in the rear. No diff or tranny.

 

have you considered filling in that crease in the fenders?

 

I used SEM panel bonding adhesive for my side skirts (the layout didn't allow for any other "good" methods of mounting). The good part with sideskirts is that when the read through line shows up, it's at a position where through should be a line anyway, so it's not too bad.

I'm strongly considering hacking the rear quarter panels off another FC and forming my own wide fenders out of those, and welding them on. That or I'll just use Dzus fittings and make them quick remove; I can't see doing the effort of bonding/bodyworking them just to have it be imperfect later.