do the trade then sell it
Like many others here, I'm a Mopar guy 1st, but 67-70 Mustang's especially Boss & Mach 1's, are also very cool cars, some of the squirrelly *** people that own & drive Mustang's, have little to be desired thou...LOL... the 69 Mach 1 is worth far more than even a perfect 74 RR... sorry, no offense intended... If you have allot of money or too many personal touches, in your 74 RR, it will only appeal to a much smaller crowd anyway, as far as value, I'm sure you already know all of that anyway, 74 RR they weren't as popular as the Mustang's in any 65-70 years, hence the million's of Mustang's over those years in sales... If the 69 Mach 1 was in good/decent shape, you could have made some quick cash, as much as I hate car flippers, used car salesmen types, let alone many Mustang guys/people {not the cars}, they sell fast as hell, blue or not, tubbed or not, nose bleed jacked up or not, you could have easily sold it, maybe bought 2 decent Mopars of more valuable style or years, again no offense intended & had some cash to mess with, too boot, to build how you like it...LOL... I love allot of different brands & makes, a 69 Mach 1, 351 4sd would be one of them, I probably wouldn't keep it long either, but would take advantage of the extra worth/value & popularity of the millions of Mustang's sold, sell it after abusing it a little while & build another Mopar or 2, probably yet another 68-70 RR or Cuda', that's been my -MO- for many years.... I really like the 74 RR you have now, even with all the Steelers stuff all over it {Raiders fan I can't help that}, it would be a damn shame to sell/trade it now... it's a conundrum, I'm so damn cofused...LOL... Bruzilla good luck in what ever you choose to do, I would support the decision...