[Andre]

Okay great, I wasn't imagining this. I know the stud is painted.. I have a few originals, but of the castle nuts I have, none seem to fit. Joe- I couldn't get that link to work.

update... I figured it must have been inline tube that you were referring to. I searched their catalog. Silly me.. I only knew them as castle nuts, not slotted nuts. Found they sell them on ebay.. pricey devils, but oh well.. I think the old water pump/timing chain cover assembly has them, but suspect those are too small.