I have a set of coated (bronze color) beehive springs that I got with a set of 799 heads. I think they are GM 19420455 bot not positive. They measure 1.25 in. OD/.845 in. ID at the bottom. Uninstalled spring ht 2.098 in.. They are marked with pink paint on the side of the spring. The coil rap seems to be the same at the 19420455 springs, these are listed as 1.25" and 1.29" depending on the website I look at. They show a lift capability of .570".

Any thoughts?

 

Unknown source valve springs would scare the hell out of me..

A good machine shop should have a valve spring pressure gage to test them, but you still would not know the source..

 

I'd pitch them in the recycling ♻️ bin and get a new set quality valve springs, retainers, valve seals retainers etc. That way you'll know for sure what's on hand to work with.