Hey milk I think we are screwed on the ZR1 wheels. Looking at the offsets that are offered for the ZR1's are +56 and +61 for the 18 and 19 combo. Just thought Id let you know since we both loved the Zr1 vette rims.
I also figured the battery cable problem/recall out. The cable is so short on my 2SS that it is rubbing on both the top of the starter & on the rear-bottom of the RH motor mount. The rub on the motor mount is the big problem. The edge of the motor mount the cable rubs on is kind of sharp & it will rub through the outer battery cable plastic/rubber coating & then short out. I don't know how many are like that but mine is. The odd thing is there is plenty of extra cable in the trunk but unknown if it can be somehow loosened & pushed forward to give some slack in the starter area.