Last year a friend of mine did the Carrera in a 230 SL as well... and finished pretty well. He did say that since it's a 6 cylinder you'll be in the same class as Porsche 911's, and he felt the Pagoda 300 kgs too heavy or 100 hp short. His Pagoda did not have any problems, and the 911's did, so he finished pretty high (he is a very good driver though) but he'd take a well prepped 911 next time.
If you do multi-day events, the Pagoda is fine: it's reliable, comfortable, and good in snow because it's fairly heavy (grip) and rear wheel drive. On the connecting stages you'll be comfortable, and in winter rallies it does well. I did the Winter Trial in 2004 with my Pagoda and found it very good.
For shorter, one-two day rallies with many mountain stages a lighter Italian car (Lancia Fulvia, Alfa) will be better because it's lighter and quicker.
So it sounds like it is good for you...
Peter