Sea Nymph has been out of business for quite some time. I collect Marine literature. My archives are quite extensive, but not for that year.
14R's are basic utilities that are very light weight. Your FMBR is a deluxe model with added options.
From the 1986 catalog:
FM146 Fishing Machine
CL - 14'5"
Beam - 66"
Bow Ht. - 30.5"
Transom Width - 58"
Transom Ht - 16/20"
Persons cap - 465 lbs
Wt cap - 915 lbs
HP cap - 35
Gauge - 0.064"
Approx Wt - 350 lbs
Looking at the specs for other 14 footers, the persons and weight capacities are reduced because the "fishing machine" is a heavier boat due to the swivel seats, carpeted side trays and finished floor (deck). Its really only a 3 person boat, with seating for only 2.
(BTW, the info is tabulated online. Simply google the model number and it will come up)