Looks like a fun project,
well my 2 cents worth,
thats a lot of work to pull an engine, and to put it back together with used parts and have to pull it out again in a couple of years to redo something is a lot of wasted energy
SO
I would make a list of everything you would want to do including pricing
then go thru the list and mark off things you can live with out
At a minimum I would take the crankshaft to the machinist and have it gone over professionally, have it polished and balanced and straightened ( lightening is optional) Nitriding is great but not needed
Take the block and have it hot tanked and get all the crud out of it
have the cylinders checked and honed or bored if it needs it
you already need a new piston so I would do all 6, and oversized are probably the same cost and they come with rings you cannot just put new rings back on the old pistons with out bringing the cylinders back to round. they do oval somewhat over time
New Cam( and check where the cam rides in the block for ovaling, there are no cam bearings and its quite expensive to line bore for the bearings,
new tappets
all new bearings
the rods should be ok
Flywheel have it surfaced
maybe a new clutch, pressure plate and throwout bearing
Gasket set
If you need some seals and things PM me I will go thru my stuff
I think I have a front and rear seal, new
I do have a new timing chain too
I think I have the old rods and old pistons if I have not ditched them yet
I spent probably way too much on my rebuild but then I have no kids
and I figured it was one year of college
Hondo