I am not an RX-7 owner but I hope you guys can look past that and still help me. I bought an Independent Rear Suspension out of what I am told was a 1989 Gen II FC NA RX-7. I am building a custom frame for my 1996 GMC Jimmy using this IRS in conjunction with a pneumatic suspension. What I need help with is it has a 4 lug bolt pattern and I need it to be a 5. I also want the biggest brake upgrade I can get. One more thing where can I get new bushings for it…Thanks ahead of time. I will attach a pic kinda of what I am doing.