89 23cc fuel tank

[osprey]

I'm back!!
Pulled off the t-top and console today to take a look at the tank. That thing is a monster. The top is not pitted much, but a shut off valve at the fuel outlet is barely recognizable due to corrosion. Foward bulkhead seems soft, all foam seems dry. To pull or not to pull,,,, that is the question? What kind of longevity should I expect from an eighteen year old tank. Could I easily get another ten??? Hours of chopping foam will not be fun. Thanks in advance for any input.