@yellowK20
this is the old style fishers NOT mm1 or mm2 . and they didnt make a lot of mm1 or mm2 truck side units for square bodys . there out there but bring almost new prices .
the 8ft hd / 8ft 6in hd / 9ft hd all use 3/8" thick materiel for the truck side frame work . and the lower beam the plow clips in to has a wider spacing than the 7ft 6in ld and down stuff . and the ld frames were thinner material . and the lower beam is spaced closer on the 2 mount tabs for the pins to clp the plow so you cant mix-n-match . fast way to spot a true un modified unit is 3 trip springs on the plow is ld stuff and 4 trip springs is hd stuff . this tends to be just for my style older stuff . and does work most of the time on newer but not always .
and i have not weighed my truck with plow on yet as many years as i have owned them . but from reading others posts on snow plow sites and old fisher info specs the 8ft hd blade/a-frame unit is 800-825lbs and 9ft hd just over 900-925 lbs . they bite down a lot better and plow up tire packed snow a bit better . plus when you trip a fisher you loose 6" of the snow your pushing over the whole blade trip of others .