How to disable 5mph bumper shocks?

I've got a 76 Duster with the extended bumper mounting and I want to bring the bumpers in and ditch the plastic fillers.Do I need earlier brackets or can I collaps the shocks somehow?
I really hate the way these things look and this is the third car I've owned with them Anyone done this? thanks,Dave

I've never done it, but I've heard something about people drilling and collapsing the "shock absorber" brackets. Installing the conventional brackets will require some fabrication of mounting holes.

I thought of drilling 'em-does that work? And how far back will they go?And, do they need to be pinned back to keep from creeping back out?
Yea, too many questions but better safe than

Never done it either,but be carefull,I found out they are full of oil under pressure-and they make a big fireball when you cut them with a cutting torch.don't ask me how I know.

drill em, they will compress 2-3 inches roughly, yeah they have oil in them so put a drain pan under it

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drill em, they will compress 2-3 inches roughly, yeah they have oil in them so put a drain pan under it

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thanks
By 2-3 inches-does that mean they'll come back too far as in against the fender?