Very ambitious Zack…!
Would be fun to see what you end up doing.
All worthwhile.
Just keep in mind that if you change the square metal relays (Bosch), the have protective diodes inside and each in a different configuration.
Wouldn’t 120A suffice?
Personal choice… but I think the easiest and probably nicest would be to find the original ones, or recover the ones you have.
Why not? will give you plenty of extra space for stuff and the audio installation.
Now that would be interesting!
Would cork stand the test of time and dirt?
I would go leather.
Do the Napoli and Bernett mods on the climate control, details in the Book.
Invest in sound proofing, makes a big difference for road noise, feel and of course for the sound system.
I would also invest in a set of nice wheels, they really have a big impact on the look of the XJS.