Hey GTO,
True that replicating the exact conditions is close to impossible, but then do keep in mind that even if your are dynoing at the crank you still run into the exact same problems!
Personally i prefer the chasis dyno...(even though it takes 15+% off the "specified" power of your car, just because it gives the true horsepower that meets the road!
When i was visiting my uncle he was telling me about how he was part of a S2000 forum (s2ki.com) and they were planning a meet to go and dyno their cars together at a nearby shop!!
Someday we at team-bhp will be in the same situation......
But will try and visit a shop with my cam as a filler
cya
Rehaan