Still looking for a spare tire

with all the tire combinations out there.. you would think that there is a fix for that.. id have to look into it but ill let you know what i find.. as for depth of spare tire housing.. are all cars the same? if i measure my 66, will it be the same as your 74??

so i know what to work with?

Also is your spare tire cover flat or raised a bit??

how wide can it be and do you have a posi?