Quote Originally Posted by mstailey
Sky Cheney,
That would be the VT555M engine.
Are you sure you're not thinking of the 504? I know they share the same stubby 5/16" plunger injectors, but the 903 has regular PT injectors. But I'm not an expert on Cum-a-parts, so you may be right. However I think it's a long way from the triple nickel to a 903 if we're talking cubic inches (I can assure you it's not horsepower).