Air shocks don't have to leak. And it's usually the hoses that leak, not the shocks. Find a set with Schraeder valves in the shock body, and don't install hoses. Those rarely leak until the rubber boot rots out.
Or choose wheels with the correct offset and tires of the correct height (yes, 15" can fit) and fix the issue.
Vikki 1969 Goldenrod Yellow / black 400 convertible numbers matching
