50% of the "numbers matching" cars aren't! It's a hobby & a loosing proposition either way.

you can spend time & money making it appear as a factory correct musclecar, & get a ~50% ROI

you can spend time & money making it appear as a custom "hot rod", & get a ~25% ROI

It's your money that you can spend/invest/dispose of as you desire .....
but there is value in the "original bones" of a 340 Swinger, that value is lost once it becomes a "custom".

Quality body, paint, parts all cost time & money: STOCK or CUSTOM