The Cobra motor has more HP, better fuel system, better intake and TB, and the Cobra has a forged steel crank. The Lincoln motors are still tough, but not as tough. The Cobra swap is the ideal swap, but not everybody has the cash for that or find a Cobra they want to rip apart. My modfox has a 2V going into it and most people ask...WHY NOT A 4V??? Well, if I find a wreck Cobra I am fixing it...I'm not gonna cut it up to build a fox body.
Anyways....I work at a JY, and let me tell you.. I am in a good location, been in business since the 1940's...my Dad took over in 1990...anyways......Lincoln Mark motors/trans/rear ends...are dead horses.....Nobody inquires on those items, and the ones we have bought years ago, are still sitting on the shelf....we can't sell them. I wouldn't offer too much for that stuff. I would be lucky to get 450 for the motor, 250 for the trans, and the rear ends...are worthless. I would sell one for what ever somebody would pay as long as it is worth the labor of getting it out. Remember...those are IRS. I would just stick with a fox or a SN95 rear end.