[Damien]

I would leave the TBI on the vans for a couple reasons.

1. TBI injection is very reliable and simple to fix if something does go wrong. Give the vans a good tune up and if you need to replace the fuel pump I would only use AC Delco or Delphi pumps. I have had other brands fail in a week.

2. You plan to rent these vans out to people that are likely not familiar with driving a vehicle with a carb. They will not know you need to pump the throttle a couple times or wait a couple minutes for the engine to warm up before driving. I see this leading to dead batteries and frustrated customers.

My wife has been driving my '83 for 10 years and still for gets to pump the throttle when cold.