My setup has remote filter mounts located on a stringer, making oil changes a breeze.

I need to do that.

[They are CV Products billet mounts that take large 1qt Oil Filters but I'm sure there are other options.

We have a few different option besides the Plymouth factory. Off the top of my head is:
Great Lakes Marine - Port Huron
JimKid Motorsports - Redford
Precision Power - Grand Haven
If you purchase ILMOR stuff, we'll train a technician in your area to be certified

Front mounting location is a bit different. Roughly 4 inches in overall length and we have extension looms because the "merc" connector is on opposite sides. And tailpipes, if they are stainless. Rubber ones should be ok.
A few people on OSO have re-powered to V-10's

All multi hour tows from Charlevoix / Boyne area! Not something U want 2 do in the middle of summer if it crops up! Short summers, time/effort involved!

Is the training on your dime & say it's a person from a local dealer, R U gunna pay them 4 there time training cuz I am sure a local dealer will not pay 4 that or their time off!! I'm sure they could not justify it cuz not many Ilmors around!!! Or would Ilmor (if new product was ordered) SIGN a promisary note they would send somebody 2 our neck of the woods if there were probs?? Pass this by Ian!!

I keep my boat on Cumberland which is very remote and Ilmor trained a dealership to service we very few V-10 owners on our lake in the middle of rural KY.

What is your service center of choice? Or what is THE place to go to near you?

Dry Harbour Marine, Charlevoix!

FYI- Ian flew to NC several years back to look at a pair of 625's I had in my previous Spectre at no charge to me. I didn't have it in writing but the bottom line is they stand behind their product. I wanna believe the training is cheap like $800. If a repair shop can't make that back in a reasonable amount of time that's a problem. Granted I wouldn't expect them to do so for just one customer.