Resurrecting a Bendix G-15

I was going through some boxes of old documents as I prepare to thin out my computer collection and ran across a couple leads that I had 30+ years ago on a couple early vacuum tube era computers--one was a Bendix G-15 and the other was a Royal Precision LGP-30. Thought it would be fun to see if either computer was still there and turns out that the Bendix G-15 is buried in a storage unit yet! I haven't heard back on the LGP-30 yet. When the weather warms up, I will get a chance to help dig out the Bendix and hopefully make a deal on it. Apparently, the Bendix was operational before going into storage in the mid-1970's. So, what are the chances that after sitting for almost 40 years that it would still be operational? I know that vaccum tubes can deteriorate but those are easy to replace. What about the capacitors, resistors, and diodes? I do not know if the storage unit was climate controlled, but if not, I assume corrosion could be a problem with all the contacts. What other issues might one expect with an old system like this? Unfortunately, I am not an electronics expert but always like a challenge. I now regret selling my Bendix Diode tester a few years ago on eBay! Maybe I will have to rent in some day if I make the deal!