Yea correct. It is the first year of the 447 engines, I think a lot of confusion is because of the TX prefix, 73 TX650 but 74 TX650A.
Basically the same engine internals till 84, the end of production. The tension-er changed. as you seem to know and the ignition from 80 on
Basically the same engine internals till 84, the end of production. The tension-er changed. as you seem to know and the ignition from 80 on