What year is your catalog? Curious to what era these might be.When we were running Dirt cars in N.Nevada one call to Erson and steve Tonzi in Carson got us what we needed. Alas they are now part of PBM and seems like all they do is Chevy. Not to sure on the snap ring but Yes Mechanical/Solids. This book is circa 1998. Back when a custom grind with lifters was about $125. Boy how times have changed. Do these have the ring?
1998 Think I got it @ SEMA that year.What year is your catalog? Curious to what era these might be.
Probably back when Super Shops was pushing Sig Erson Cams. Just saw a Pic of Eddie and Ercie Hill. Man that guy dont age.I'm not sure but I'm guessing they are a lot older. I can't remember when they went away from Sig Erson to Erson. The font is definitely 70s looking.