Ok, decided to ask a friend of mine who's a doc - he's not a plastic surgeon but has some knowledge of this type of thing. He said that the material that calf and pec implants are made of is inert, won't cause any problems. It's also solid, not fluid filled sacs like dem big fake titties.
As for an x-ray, he says it's very possible they wouldn't show up depending on how it was done, rather something funny might possibly be seen or nothing at all. He said guys have chest x-rays all the time for physicals, TB etc. and the pec implants don't show at all in a lot of cases, same for calves. I doubt he's pulling my leg on this. I can bet there's more than a couple of guys out there right now with some calf 'inserts'. Look at the "Synthol" use or whatever.
Also looked around at the stuff about Wheeler, I guess his calves just 'popped up' one day, and while he offered to be x-rayed it's not sure whether anything was really done or officials looked the other way. Don't know. Don't care. I'll be there's scores of guys with implants. There's probably delt implants, even though I've never actually seen anything about them.
Arnold was accused of calf implants too. But I'm not sure they were doing that back in the day.