Patrick the one on the Marlin race car is a Ford rollbar if you look its connected to the front of the lower wishbone. The other pictures show a e30 rollbar and they are connected to the rear of the lower wishbone.
The cars going ok still have a small misfire though. Taking it down to Marlin on monday they are going to tune it for me.
Not sure where the rollbar links are from but i do have a pair as i didnt fit my anti rollbar (Marlin say not needed) if you want the ones I have make me an offer for them.