I mounted mine by the driver side rear tire. Note that sometimes I get a loud hum sound if the rubber hoses touch any metal, so you will want to prepare for that. To be honest, I think I could have done a better job, but I have plans for EFI, so all of this will be removed someday. Here are 2 pics, not great, but will give you an idea. Also, it did get better when I used the rubber isolators between the pump and the frame. I got them from napa. IIRC, I think I found that running my regulator at 3psi worked best for me.
[img]http://s1006.photobucket.com/user/zarktheshark1/media/weber/100_0015.jpg.html?sort=3&o=12[/img]
[img]http://s1006.photobucket.com/user/zarktheshark1/media/weber/100_0020.jpg.html?sort=3&o=7[/img]

Here is a link to the various pics I took when converting.
weber pics

'88 Raider. 2.6L dead...2.4L swap in progress, AT, 33's, 2 bouncy seat,AC, CC, 2.25 exh, 2" Tbar, 2" BL, rear DB, rear LSD,4.90's, SW hubs,gen2 uca's, KYB shocks, snorkel, elec fan, MSD.

'99 chev k3500 crewcab
'15 Subaru XV
'03 BMW i325