Here are some of the overhaul options.
Purchase of individual spare parts
If the inspection shows that the cylinder block and most of the parts are in satisfactory condition and can be used in the future, then it is most economically feasible to purchase individual spare parts. The cylinder block, connecting rod and piston group and crankshaft should be carefully examined. Even if a slight wear of the cylinder block is detected, the cylinders must be honed.
Complete crankshaft
This overhaul kit includes a re-ground crankshaft and a set of matched pistons and connecting rods. The pistons are already installed on the connecting rods. The kit also includes a set of piston rings, main and connecting rod bearings. These kits usually contain pistons of both standard and all overhaul sizes.
Partial cylinder block
An incomplete cylinder block contains a cylinder block with an installed crank mechanism and a piston group. The kit includes new main and connecting rod bearings, and all clearances comply with the norms. The existing camshaft, valve mechanism, block head and mounted units are mounted on the kit. Machining costs are minimal or not required at all.
Complete cylinder block
The complete cylinder block contains the entire partial cylinder block set plus the oil pump, oil pan, cylinder head, camshaft bearing housing cover, camshaft, valve train, camshaft drive gears, toothed belt, and belt covers. All parts are installed with new bearings, seals and gaskets. Only the intake and exhaust manifolds and attachments are mounted on the kit.
Consider carefully which of the alternatives is best for you, consult your local auto repair shop, parts suppliers, and parts sellers before purchasing parts.