Resale value all is dependent on condition
#'s matching engine trans & rear etc.,
all the proper stampings vin & fender tag
when done experts say, they can "allegedly" fetch 20%-25% more resale
with out any engine or trans, a real R/T roller shell, your guess is as good as mine,
condition condition condition means everything,
how much of the rest of the OE R/T is still there ??
resale value when restored/finished quality of the build & attention to detail on the restoration,
IMHO is probably more important than #'s matching, when it comes to resale value,
as long as it's disclosed, some of the more purist at heart, will argue that point maybe...
#'s matching IMHO isn't as important,
if it's not rare, or low production #'s,
than IMO it really makes a big difference...
I've seen many resto-mods & pro-touring cars, go for more $$$,
than 100% OE original 1000pt concourse cars too, depends on the buyers & market...
like everyone says;
"it takes all types,
there's an *** for every seat,
it worth what somebody is willing to pay"...
I'd personally {not knowing the cars real condition} start with about
{or take off as much as deemed necessary, for missing parts}
1/2 of the asking price & go from there,
if you like the car & see value in it,
if you can get it for "what your willing to pay", then buy it...
I bought a complete running & driving,
100% #'s matching 383ci 727tf drive train, slightly rough exterior,
perfect black Décor interior, 69k original miles, real LL1 Surf Turquoise,
1968 RR HT RM23 for $6000 in the peak of the market 2005
I have at-least $25k invested in it now & 100's of hrs,
but I'm not going to sell anytime soon either, I build it all myself & to my taste...
there were many other cars I looked at, that were basket cases
&/or really rough, for the same price or even more...
My thoughts were;
"It's better to buy something as complete as possible"...
My point is there are good deals "still out there" now too,
you may have to travel to find or get one...
good luck