[HSSS427]

Hmmm...good question George. I got the stuff back from Keith Craft in boxes and don't know for sure if there's a way to match the lifters up to the cam. I will check as I haven't actually opened the lifter box excpt to see what was in it.

If I was looking at them, how would I tell if they were the "shell" type? Not familiar with that description. They were in the engine when I bought it so don't have all the details, but do have a stack of receipts from the original builder that I can scan through.
Thanks!