Who knows what's in that there engine after all these years? Unless you open it to inspect . . . .
I also have some dubious stamps averring 'high compression', and yet the pistons are a very nice pair of flat top things that will hopefully last for ages and allow the nether regions to do the same. Personally, as a relatively high mileage 52-week a year person, I reckon a decently maintained cooking engine can often be a better bet than a more rorty one that only works right on alternate Tuesdays. Especially when we get out mostly on days that aren't that Tuesday . . . . Although I am of course all ears and momentarily jealous when people who know tell me that a 357 cam and something well north of 8:1 c.r. is the d's bs.
But if I truly deeply madly wanted them, I wouldn't have sent the poor dog to the vet . . . . . and I'd have bought shares in an octane boost company . .