[Bailey]

The BMW lug pattern is close to the Ford pattern but different. I had a set of track wheeks for the FFR that would not fit the BDR. If you are insistent on the Bullit wheels, which I happen to like, ( I have a set of 17s on a 67 Mustang coupe), you will need adaptors, which are highly suspect for any kind of track time. As far as power, I have had the car dynoed with 428RWHP, and two years of driving and several track events, no failure if the rear end, some other interesting mechanical issues, but the rear end has been fine. These cars are light which helps a lot.
Hope this answers some of your questions.
BTW if you are looking at buying a built car, look very carefully, and take someone with who is familiar with Cobras. I have seen some fantastic FFRs out there, also some scary pieces of work. BDRs are all factory assembled.
This is certainly NOT a FFR bash, but look carefully,
Richard