Hey guys, I feel like a noob asking a question like this, but i just never even had to think about it before. On my 291 double humps, what size valve stem seals do I need. I think I may have ordered the wrong size from ebay.:whine:

Don't know but I figure the black "umbrella" one's will do you fine!!

pdq67

11/32" is the dia. of the common small block chevy head valve stems.

So the hole in the seals will need to be 11/32"