I thought 773 was B52138.I think thats a BC car...had a shaker on it in 2006 when it was in Texas. The Canadian 802 cars order #'s are B99... Whats the earliest 71 J Vin known ?.Lowest I've seen is 139. I know we are talking J's but a customer of mine out west aquired BS23N1B100020 completely fubared been a local circle track car.Was EL5 ..it would have been a B99 order # for sure.