Spartan Locker in 65 12 bolt Issue

[mtnxtreme]

Bought a Spartan Locker for my 65, after I install the side couplers where the thrust washers were , the axles and c clips,the center pin does not fit between the axles. Spartan is telling me the 65 had an early narrow carrier and I cant use the locker but have to buy a whole new wide style carrier with limited slip, I'm pissed, $350 down the drain, has anyone ever heard of this and maybe know some option's, I really don't want to put my spiders back in.