1973 B3 Duster

I've seen but a small handful of '73 Twisters (none in person) , and of those I've seen , none of them retained their original-style paint scheme . Why ? I don't know .

TB3 looks incredible on the '73 models. The second car I bought was a '73
( VL29G3B375353 ) in TB3 with black interior .

The reason why your bodyman said that the flat black is a "one-shot deal" is because of its composition and finish : it's Organasol black , which is a rough-finish lacquer ; it's nearly impossible to sand !. The factory actually painted the Organasol black first , then laid down the body colour ; a template was used .

Good call on the 340 / 5 speed swap !
Personally , I'd like to see that 340 painted "1972 Blue" ; but , that's your call .

What kind of brakes does it have ? Archaic drums all-around ? Hold-over small bolt 4 piston discs ? Premium single piston brakes ?

Finally , what differential does it have ; 8.25" (10 bolt service cover) ? If so , you'll be okay with it , but I'd do something about upping the gear if its final drive is presently 3.21 or (numerically) lower ; 3.55 would be a good balance with the overdrive gear 5 speed .

Keep us updated !