When installing the crank and rods in my post, it requires the removal of the pistons, rods, timing chain and a few more. That means the engine Removed. Head off. Pan off. May as well get new main bearings as the new crank will most likely have been reground to diff. dimensions. Same for rod bearings but they are not Too expensive.
I was saying, maybe the pistons and rings can be reused on the 230 rods.(=no rebore of the block). The timing chain and gears may be reusable. Check the block for rust buildup, along with the valve cooling tube condition after water pump removal. Turn motor over and look at valve seats and valve seating surfaces and on and on. ALL can save some bucks, But can you do it? Experience?
A good straightedge on block and head. To check for flatness.
A motor rebuild business that's cooperative will show you whats up if experienced in these motors, most are, but not all!
Most usually recommend a total rebuild for them to offer any guarantee. Includes a block leveling shave, a head shave, replace all valve quides, and on and on including bore, new pistons and rings, reground crank, unless already done, new oil pump.
$2500 and up.