which is the appropriate amount for finishing the model

The swivel base allows the vent to remain plum when mounted on a peaked roof

Model Number: 87846

This is a Lionel 6-85360 Union Pacific Challenger 21'' Passenger Cars Pack

Trainz Product Id: 11462737

Rapido Trains 21053 HO Undecorated ALCO/MLW FPA-2 Diesel Locomotive Standard DC DwDetails-5.00-5.00-12.30-6.30-6.00-2 which is the appropriate amountThis is a Rapido Trains 21053 HO Scale Undecorated Alco MLW FPA 2 Standard DC (Phase II). Features: HO Scale DC or DC DCC SOUND,5 pole, skew wound motor with excellent slow speed performance,Operating number boards, headlights and two color class lights,Roadname specific details,Dynamic brakes,Etched metal grilles (Farr or chicken wire, as appropriate),Full underbody piping and conduit,Correct, roadnames specific FA 2 and FPA 2 fuel tanks,Separate