1971 340 Build - Choosing piston rings dilemma

Hi all from Perth W.A., I have not posted a question for a while although I have spent many hours sifting through posts about 340 builds and pistons and rings and more...

I am collecting parts for the build of a 1971 340 - it's all machined up ready for assembly (although the cast 1.88" int. heads might yet get some port work).


A 71 340 should have 2.02" intake valves... That was the last year for the 2.02" valves...

72 & 73 the 340 got 1.88" intake valves