nice lookin beam there pal is it 2wd or 4wd?????

im looking to start making one of these myself with the 6 degree mod and the adjustable rose joints etc . do you have any specs ,measurements etc and did you modify yourself or was it done by someone else??
either way nice looking job pal
im looking for as much info as i can get on beam mods ,can do the grunt work myself ,but getting dimensions and info first is a pain lol