When Fred first tells Lamont about his dream, he is riding on a train. His dreambook states that the number will be 219 which is the number for riding on a bus or a train. However, while trying to further convince him a few minutes later, he says that he was in the dream riding on a bus.
If Fred won $3000 on a $5 bet, he would only have about enough to buy a new pickup truck, as the MSRP of a Chevy C10 long bed pickup in 1973 was just under $3000. (Unless he was referring to a more newer second hand truck and not a "new" new truck in addition to the other things he said he could do.)