Hey guys I think we can all agree we all like 67-72 trucks which is why we are on here... and with all the aftermarket stuff available we can take all the modern convinces (to each his own to choose what he likes and not for others to ridicule) and make our old trucks have them! On that note, here's my list
1) More insulation
2) Fuel Cell is not in the cab
3) More power/ towing capacity.
While all of this is easily done to our old trucks... I still like the old trucks way better! Heck my '67 rode better on the stock 40 year old suspension with the original shocks than my '09 GMC Sierra Crew Cab All Terrain Edition