all p-pumps look the same get me the pump #no and gov #no. if it's off a mack it's 2100 RPMs:badidea:smknram said:Has anyone ever used a p-pump off of a mack big truck on there dodge? i believe it is a 998 pump (appears to be the same). i was just wondering if it would work and if it would be any better than a regular pump off a dodge.