My 73 340 Duster has the OE low compression but it has a different cam, 224* @.050, and LD340. Same gearing, 3.21 open. OE replica bent exhaust and tips. She’ll bark when power shifting to second.
I have a set of TTi shorties in the box I am wanting to put on. Peter Bergman also sold me a 2.97 3rd with True Trac for when I switch to the 8.75 and I have a spare 3rd to have optional gearing.
My heads are a Z and a O head, which I’ve heard are good.
Eventually I would like to up the compression and have a friend port the heads and match the intake.
This is good info.