Do mono leaf springs have center bolts?

[My52Chebby]

Hi,

Do mono leaf springs have center bolts?  I'm talking about mono leaf conversion springs with a 4" drop for '47-'55 Chevy pickups.

Also, can you re-arch a mono leaf spring?

Thank you.

My52Chebby

[enjenjo]

Some have center bolts, but most just have a pin forged into the spring. I expect it would be possible to rearch a monoleaf spring, but it wouldn't be easy.