I have a 69 Firebird Convertible TA tribute car with 527 to the wheels and 514 ft lbs tq. It has been suggested to use Calvert Racing's Cal Trac Split Mono leaf setup along with their 9way adjustable shocks. vs a 4 link setup. Does anyone have any experience with Calvert Racing setups? Also, what is the largest tire size I can use. I have 17" x 9" rims on there now.