the cages is in the car allready. i have not done any bars through the firewall yet i want to setup the motor in its place so i know what room im working with. right now the cage is a 10pt cage from s&w with a extra diaginal bar in the rear hoop. good point about starting or ending the roll bars in the middle of another bar i didnt think about that. The reason for angle of the rear hoop is because the kit cage only gives you a small top hoop and its the angel of the b piller and the seat if it was strait up i would be siting on the dash lol. thanks for the thoughts & ideas