OP originally stated the desire for a "63-1/2 ford galaxie".
"63 1/2" is a generally accepted albeit imprecise colloquial term for the '63 Sport Hardtop aka fastback introduced Feb/March 1963. I've nver seen an official Ford document stating "63 1/2" (nor any 64 1/2 Mustang btw).
WIth respect to that listing, Action as usual is spot on. Heaven only knows what the engine really is. At that price what else would the dealer say? A rating of < 92% is hardly stellar. Yes the engine bay is a mess.
When I first saw the ad (last week), I thought it listed the serial number (what many call a VIN) and noticed it shipped with a 352, but cannot see it on the listing now.
A knowledgable seller should at least post a photo of the 'warranty door tag', a photo of the serial number stamped into the body and plenty of under body photos.
And I'll refrain from saying much about the wheels, except they look stupid and the ride will suck.
Kevin