340 balance question

[randy73]

Putting the 46rh in today and it suddenly dawned on me that I forgot to check whether my new TC is balanced or not.

So, since the 340 is internally balanced, the TC should not have any weights, correct?

[Chryco Psycho]

Most 340s were internal , the 73 cast crank were external
no weights if internal balance

[randy73]

Thank you, did not know that about the 73's. I am glad I asked, before I screwed up.

[John_Kunkel]

Late '72 (after 4/11/72) also has a cast crank and needs external balance.