The Pinto has spawned loads of legendary variations, most famously the YB Cosworth engine, but also things like the Millington Diamond engines you see powering most top Mk1/2 Escort rally cars these days, among other things.
The thing is, while the Pinto was cheap and common, let's be honest, it wasn't that great, and didn't exactly set the tuning world on fire. Granted, it can be made to push out decent performance, and the bigger bucks and much rarer YB/Millington/Warrior/etc headed versions can be pretty insane, but for your average Joe road car tuner, once the 80s and 90s came along with various other, better, engine options, it just didn't cut the mustard; especially as there was very little serious turbo development done by tuners or racers on the basic 8 valve production Pinto engines.
In the USA though, they didn't get 'our' Pinto, but oddly, and on a similar time scale to our engines (ie early 1970s on), they got a very similar looking, but it turns out totally and utterly un-interchangeable engine, fitted to a car that was called the Ford Pinto. But the engine wasn't called a Pinto, the engine was the Ford Lima.
Standard capacity is one bonus, but another is, like it or not, the Lima block seems to be a lot stronger than the production Pinto block too. Normal Pinto blocks are generally considered a liability above 400bhp (though more has been done, with some risking pushing the 205 block YBs beyond 500...), and beyond that it's generally the stronger (but interchangeable) YB Cosworth (4wd and RS500) blocks that are needed for the Euro Pintos.
The Lima block though? Well, 1000bhp+ has been known...
Another massive advantage is the Lima attracted a huge tuning and motorsport scene in the USA and South America, so unlike the Pinto, there's a large amount of tuning knowledge and parts out there enabling BIG power; especially with turbocharging them.
Perhaps the biggest single advantage though from a road car tuner point of view, is, from 1979 to 1989, it was sold as a factory turbocharged engine on a huge number of vehicles. This means it was not the lucky rich few who got to play with them, but your average Joe had no problem affording one, as they were cheap and relatively commonplace.
It's not like these 8 valve engines are only good with a ton of boost shoved down them either, as they're hugely popular in naturally aspirated form in midget racing (crazy single seat dirt track go-kart things, not small people with large heads), and often push out 375bhp from 2.6ltr versions revving to around 10,000rpm!
In fact Esslinger are so confident in these things, they sell a sealed crate race motor, 2.6ltr, 340bhp, and 9400rpm, that is capable of over 30 races before needing a rebuild- Try that with a Pinto!