My 1937 designed continental engine has mushroom lifters, they redesigned the cams in the late 40's and required the lifters to be changed. Steel cam, cast steel lifter, cast steel cam, steel lifters. screw it up and it wipes the lobes. Tim

1941 Taylorcraft
1968 Charger
1994 Wrangler
1998 Wrangler
2008 Kia Rio
2017 Jetta

I didn't do 4 years and 9 months of Graduate School to be called Mister!