Are you aware that the only thing different with these is the needles (needle and seat) have springs on them for off-road bouncing around, and all the linkage is black? Bought a new one on the cheap from a member here and slapped it on a 90 W-150 318, but I ended up yanking those springs as I was having issues with fuel filling the bowls. Otherwise there are no differences other than possibly the jetting could be slightly different than the standard AVS but that usually gets changed with tuning anyway. Standard version is few sheckles less iirc.