Hi!
Ofcourse it could be done...but why ??? When it's so easy to just set the high speed needle a little rich and run the engine in the car ...as it is.

But if you do want to run them in using a bench try to use a small prop as those are high reving engines.
6x5, 7x4 or 7x5 would be fine (8x6 is too big). Naturally APC.