Many years ago, I bought all the parts to do a 1052 myself.
I had hydrolocked an engine and bought a used one. (uhh, to use temporarily)
Started getting things ready, balanced "everything", started to buy gaskets/etc, and stopped.
Bekuz, the "temporary" engine in the bike is running so good, that I never had the initiative to crack the case do the build.
And bought a C-14 that more than satisfies my need for speed.
Someday, I might get back to it. But probably not.
I have the C-14 and have the C-10 is a spare/back-up.
Waiting to see how yours comes out.
What piston clearance did you use for the bore?
Ride safe, Ted