sorry about that. An exhaust bobbin - also known as a cotton reel mount - a barrel shaped piece of rubber to hang the exhaust on. Like this. 
no worries, in any case is my fault not to understand some words
here in Spain we call this 'silent-blocks', and might be a solution but have bo clue where to install it.
This is the topic I was thinking of. Although looking at it I think I'm thinking of the wrong thing. 
I saw this item before posting this thread. To be honest, I do not like that much. Rather like not to touch the rubber cone!!!
I fitted them to the Mighty i look after at the start of the year..
bit of a pain to do on the car but basically:
Disconnect the brake line on the radius arm and move underneath / out the way (tiewrap clip it back to the arm)
grind smooth the area where the metal bracket is where the brake line goes through (on the top of the radius arm)
drill and tap. (awkward when the radius arm is on the car)
fit bumpstop and its mount - awkward bit here is fitting the bumpstop to the metal mount!
trim top of bump stop if necessary - and make sure any body seams are out of the way...
They are a lot beefier than an exhaust bobbin...
TTFN,
Dave
Thank you very much Dave for the nice description. I do have the radius arm out of the car... it is a full restoration!!!!) so might be easier to do it. Nevertheless I do not like the idea of drilling and moreover to move the brake pipe underneath the arm. I am afraid it can be damaged easily.
I've been searching internet and found this:
http://www.sracer.co...ucts/spr015.htmaparently, minimania (the US equivalent to MINISPARES) have those in their catalogue.
Have you heard about this item?... is it worth to try it?
Cheers and thanx all you for your help.
Guille