Don't know part #, but price from dlr. is $347. per side + $8. per side for a stiffner brkt. that must be used.
------------------
Y2K 3500 QC,SLT,4X2,White, 6spd,3. 54 lsd,Banks Stinger +,Pacbrake,Pilar mt. EGT & Boost,Amsoil air filter,all amsoil lube w/BMK-15 filter system,MagTec rear cover,putco boss rbs. w/ rear ext. &flaps,20K reese,100 gal. aux. fuel,fold up T cover,5K airlift bags w/comp. ,ranger 2950 cb pushing palomar 225 amp,phantom radar det.