Best place to buy rear springs a body? selling caltracs
I would check with ESPO
http://www.springsnthings.com/ . I too have a new set of Caltrac split Monos that came with the car, just looking at them make me think it will not make for a good ride. However if you are hooking gobs of HP to the ground these with their bars and adjustable shocks seem to be the ticket.