[hharney]

Skymasters were not built in 1983, 1980 was the last year. Could be a Riley conversion as some of those may be referred to as when the conversion was done but none were zero timed.

Fuel tanks are aluminum and very rare to be replaced. Not like bladders or wet wing. Maybe corrosion issue would warrant replacement. Don't think you will find much on the site here that refers to replacing fuel tanks. Is this the same IA that told you the pressure system is a red flag? Just curious because you seem to be getting some bad info.