Early A: Have plans/diagram/photos of Rear Shock Extension?

I know all about longer shocks. Back in the '70's i used the Chrysler super stock springs and the Chrysler recommended shocks (longer) on my bracket racer.

Today, 2021 I am in Mexico with a stock 318 Barracuda in a different situation, just looking into the possibility of shock extensions and I would appreciate any input on THAT installation/fabrication. Thanks again.