Best Air Shocks for Raising Back end?

I have a 66 Barracuda with an 8 3/4” read end. The air shocks in the back aren’t very old, but they suck at holding the back end of the car up high. They leak any air almost overnight, and the lines blow out if I try to put more than 80 lbs of air in them. The car’s not sagging, but it’s too low in the rear for my liking. I want it to be slightly raked, sitting a little higher in the back than the front.
Does anyone know of a specific brand or type of air shocks that hold up well?

I’ll go ahead and answer the actual question instead of telling you what parts I think you should put on YOUR car. Gabriel makes a decent set but they cost more than Monroe shocks.