[rellick]

I think the 555 was the most common engine in the Newells, the cost for 555 or the 903 that they also had, parts are harder to get and very pricey. The cost to repower with a newer engine is about the same or could be less than rebuilding. It takes roughly 100hrs to do a repower, and the engines are fairly common. It makes alot of sense to upgrade if the old engine needs a rebuild. These newer inlines fit in just like they are made for it. Heck I pulled my perfectly good running 555 and replaced it. I found it lacked in power and was hesitant on taking it on a long trip, if it did decide to grenade on the road I dont know where I would find parts. The 8.3 is the big brother engine to the 5.9 found in dodge trucks. The 8.3 is the C series and the 5.9 is the B series, same engine just bigger.