Like most I think the 89-70 Boss Mustangs were the pinnacle, but I think the hated 73ish Stangs with the 351Cleveland 4V (especially the Boss 351) is seriously underrated. Yes it was a pig, but it was a FAST pig. People should look up it’s stats vs the 429. You will be in for a shock.
That car, with side pipes, rear window louvers and 50s/70s to me is the ‘classic’ redneck backyard hotrod. I’ve built a few cars over the years (and trucks) but never could find one in salvagable condition that the owner didn’t want a fortune for (just the regular ones, bit the Boss, which is rare as hen’s teeth to begin with.) They are usually either on the wrong side of ‘project’ quality or in good shape and should be left alone for what they are.
And a 351C4V at 7,000 RPM makes the most beautiful sound on earth.
Edit - 69-70.....grrrr....