It is all in your court. Expose some make records of exposures... I'd photograph a grey card with a baseball, and some other items lit by the sun say on the steps of your house at noon. Make records, perhaps run a couple batches. Microdol-X, I always understood reduced the sharp edges of grain in high speed film. I'd go with D-76 or HC-110.
No point in any of "us" offering specifics as to your claim "I suspect it will be fine". I may have been heated to 110+F for a day or a week or most of several summers in a warehouse, or the trunk of a 1964 Chevy.. Most people would have thrown that film out in 1977 let alone 1997 or 2007.
Let us know what you find, you have work to do if you are going to use this film, go to it.