There is one problem. The statment is not really true about the 50 state legal. All the replacement carbs say "NOT FOR USE ON COMPUTER CONTROLED VEHICLE" meaning if you have one of those electronic carbs, you can't use it as a direct replacement. That also means if you have a CA truck, they are illegal.
Calif has more emissions stuff on them. I knew in CA you definitly had it, but I didn't know if it was federal too. If it was federal, I think it was an 86 only thing.