Question on towing capacity or rating of a truck->

[Jeff H]

I remember seeing a discussion about towing car trailers somewhere but I can't remember where. Anyway, from what I remember, some states have some hefty fines for towing more than what a truck is rated to tow. I'm looking at buying a 91 SS454 pickup for my every day vehicle, but I also would want to be bale to tow my 69 Z28 to shows when it's done. The truck has the engine and trans that can tow an enclosed car trailer, but I don't think it's rated for that much. Is there any way to legally increase the towing capacity of a vehicle like this? If I did suspension and brake upgrades could the vehicle then be certified for a higher capacity? If there's a risk of getting fined, might as well spend the money doing the upgrade anyway. Does anybody have any thoughts on this?

I did a search and found the old thread here I was thinking about. I'm still wondering if it's possible to increase the vehicles towing capacity though.