Question about seat bums

A good friend is into Mustangs and he was planning to do a '65 this winter so I asked him to let me borrow his seat foam to compare to early A-body buckets. He agreed but then his wife convinced him to rebuild their '68 first. So now it will probably be a couple of years before I can get measurements for free. They certainly look to be close enough to work by .I might have to order a set and take a gamble. I would love it if someone could get some measurements before I give in and order Pony Parts.