Hi,
Rolling Thunder book is regarded highly with respect to the photos of how they are meant to look, but trying to find technical details is a lot harder, I've yet to see two bikes that look the same, the B50 website has a few photos , but if you go to the "Thumper Pilot " web site and follow the link to CCM there are a lot of bikes in there, I suppose most thirty five year old race bikes have been altered, modified, and uprated more than once by now.
cheers