Uhmmmmm.........not sure I want to add up all the numbers on the front engine change
It's a lot, but you can always call Continental. They are really helpful folks down there. They will have all the costs and options. I bought a factory reman w/ the better main bearings for the extra TBO (wasn't all that much more). Installed in May last year and it's go about 175 hours on it today, all good so far. This is the second reman I have done. I keep the two engines about 1000 hours apart from each other that way it's just one engine at a time (sorry Ed) and I always have a faithful powerplant that I know and love (for those over the water and night IFR trips).
I could add it all up if you really want to know but I really don't want to know
I did my hydraulic pump overhaul, prop governor overhaul and a few other little items when I did the exchange. Doing the exchange cuts a lot of down time vs overhaul at a shop too.