I've still got my 2.6 IT-S Benz. We did some additional engine work this past year and got 20 more HP but I haven't raced it since I'm running the Porsche in IT-S. I jumped to another enduro team so we haven't run the Benz there either. 2650 is difficult to get down to but not impossible. BTW, the rear wing is from the 16 valve 2.3 and not correct for the 2.6. The 5 speed trannys are rare.
Chuck