No,
with B/A/A it will have more cargo closer to 80 Tons, and only need 50 fuel, power =1, 10Pn = 10 tons. Jump =2, 0.1*M*Jn = 40 tons.
even with an extra to reserve for a second fire control it would be 77 tons of cargo. Which TBH is better, but that doesn't match the adventure.
So it's got to be B/B/B.

with B/A/A it will have more cargo closer to 80 Tons, and only need 50 fuel, power =1, 10Pn = 10 tons. Jump =2, 0.1*M*Jn = 40 tons.
even with an extra to reserve for a second fire control it would be 77 tons of cargo. Which TBH is better, but that doesn't match the adventure.
So it's got to be B/B/B.

You could convert it to '81, and run the adventure per '81 rules, which would significantly cut down on the number of break downs and mis-jumps, but the ship's numbers wouldn't be that different, Again B/B/B, plus 60 tons fuel would give you about 63 tons of cargo. This design has alot less staterooms than the A1—The design specifies 6 staterooms, 4 regular stateroom (Captain+ 3 passengers) and Double occupancy Staterooms for the rest of the crew, presumably 2x double staterooms at 4 tons each, for 8 tons and holding 4 people total. that would give 8 total bunks for the 8 pre-gens the adventure includes. The only major change is the cost of the air/raft.The numbers add up if it's originally a LBB2'77 design with B/A/A drives, 50 Dt fuel, and two Dt reserved for fire control.

Converting it to LBB2'81 with B/B/B drives, and 60 Dt fuel takes 16 Dt, costing either four staterooms (10->6) or 16 Dt cargo (61->46 Dt).