Really you just have to use discretion. There are a lot of cars on the HAMB that bend the rules - I own one. The '49 body gets me in the door no problem, but the 396 doesn't make the cut off. So where should I be? There are boatloads of 55-57's on here running nasty big blocks. And 60 - 66' Chevy suburbans/panels are all over the HAMB. Come on, it's a Rambler not a Jensen Interceptor (can we please talk about Jensen Interceptors?) The HAMB seems to have outgrown the most rigid interpretation of traditional, i.e. specific build date with no parts manufactured after that date. The HAMB is having growing pains. There never would be a site with over 46,000 registered model A owners! (thats how many HAMB'ers there are!!) I really like the traditional emphasis and think it should stay that way, but let the rest of us play too!!