Well if it still running and want a few more ponys , well quite a few more I would just build up the 2.0 as a turbo engine , parts can be found , and as a few people reported that burton power in England has the parts , brought a few parts for my 2.8 , most people believe the 2.0 in the pinto was stopped being made around 74 is wrong , they made it his engine up past 2010, they even have EFI , if the car is a nice one and not a rust bucket and can be restored , I would not cut the car up to do any engine swaps, the 71 is becoming very rare and just doing a few engine mods would be the way to go and easier on the pocket, some good low compression Pistons , mild turbo cam, AK miller turbo exhaust manifold and a turbo, last one I did was back in the late 70s , it was a draw though , the turbo was a T4 B , had the seals so the vacuum would not zoop the oil out into the intake system, good port job , and a 3.55 rear end gear would do very well , at a later date when you want to sell or restore the car just remove the turbo and install the stock stuff back, save the car , like land they do not make anymore