Cost for labor on stroker build?

Also to add: buying parts from the machine shop may cost a bit more but honestly it helps them stay in business.
With that said - a good machine shop bores the holes and “sizes” them to the pistons individually per cylinder.
You cannot do that at home… easily.
Everyone is an assembly hero after watching a few videos, reading some books and I’m not sure of your skill level. I’ve personally assembled over 50 engines in my life time - some are still racing around on the street to this day. So I am all for you assembling your own engine. There is a lot of pride and satisfaction in doing so. But recognizing your limitations and letting the professionals do their job is well worth the money.
Syleng1