we used to buy2 sets of starfire 4 rebuild sets.
had a reamer for the gudgen pin with a jig.

we also used the bedford 173 cast iron rings and refreshed now and then.

but for a time range rover piston could be bought at the right price-removed from brand new vehicles to lower the compression ratio for NSW.

some prefered a volvo piston as it was fully floating.I dont know how that goes with the conrod little end but im guessing theyhad it as a pressed fit-

I had boxes of manual flywheels the scrap man loaded them.the 6 cyl flywheel is a better option its not like a rover is over geared and needs that flywheel mass to get it rolling.