Modeling conversion of gas station to include E85

We want to model the impacts of a project in which a gas station is installing additional equipment and facilities to be able to sell E85 and E15 gasoline. I know the construction costs. However, the gasoline dispensing equipment accounts for a very large potion of the construction costs. Rather than plug all of the construction costs into Sector 62 Maintenance and Repair of Nonresidential Structures, should I break out the cost of the dispensers, and attribute them to Sector 289 Measuring and Dispensing Pump Manufacturing? Would I also include the cost of dispensers in the Sector 395 Wholesale Trade to capture the margin?