Number one caution is that you absolutely MUST use the right tool to remove the crankset. Otherwise the chance of destroying the crank is 9:1.
Also, it is best to use some penetrating oil and employ a torch (just to warm it a little bit - not too much) to facilitate removal on a crank that's been untouched for so long.
If the cap proves to be unduly stubborn you can try slotting it, and employing the same tactic as above, Again don't overheat.

You will need non-aero hoods for those levers. They are available from Niagara.

PS - The rule for tires is: "When in doubt, throw them out!" .