Breathing new life into the 318 in the Scamp!

Replacement lifter came in. It's approximately .051" taller, overall, but it appears to be the same height, comparing one plunger seat to another, where it counts. They are identical in diameter to .0002", so that's not a concern.

Should I use it?

The only thought that went through my head is that perhaps oiling would be different on this lobe, but as long as it's sufficient, I don't see why it would make any difference.