Can you interchange a 6.9 injector pump and put it on a 7.3 engine or is it better to buy a 7.3 injector pump? thanks, Jeremy

 

Yours is a 90 so they are similar but internal IP pressures and workings may be slightly different. It would work probably but not like the real thing. I would advise get the real one for your truck...... http://www.mwfi.com/ford_73.htm

The 7.3s have different IPs also after engine date 92.5, 93, 94turbo.

 

Thanks alot for your help. I will be ordering a pump from Midwest tomorrow.
Jeremy