how much power just depends how much you want to put into it,, i know many 2F's in the 160 hp range, a few in the 220-250 range, and then theres IGOR, while not a 2F he is proving a point about straight six engines and running 7's in the 1/4 mile, he currently holds the national record of 4.87 on the 1/8th mile.
Okay this is getting ridiculous, apparently there is a misunderstanding or something. I guess I didn't do a good job of getting my original point across. First off, I totally agree with you about inline motors. I don't think I have said anything bad about them. There is a reason why tractors, heavy equipment, semis, they are all inline. That longer stroke produces quite a bit more torque in comparison to a v style motor. That inline combined with high compression makes for a pretty sick setup. You take that high compression inline, make it diesel and turbo it and you are in business.
I totally believe you also when you say that you get better fuel economy with your diesel driving on mixed off/on road. Everybody knows that a diesel motor consumes hardly any fuel while idling and working at low rpms. That's the beauty of most diesel motors.
And sure, you are right, if you throw enough money at any motor and build it up, you could get more power. It "could" be done. You could do what some guys do and build a 2fe and make a sick motor. You could bore it out like crazy, get some aftermarket (possibly even custom) pistons, bump up the compression and get a lot of power too. You might even be able to push 200 hp like you say. There are people that do this. Thats fine if you want to waste the money. But that still brings us back to my original point of practicality. You could do the typical tbi 350 swap, break the 200 hp mark, have probably around 300 ft lbs of torque, and average about 18 mpg (which is what most people report here on mud). All that for around $2500 to $3000 if you do the work yourself. By the time you rebuild a 2f you literally could have had a v8. By the time you do a diesel swap you could probably have gotten 2 v8s (depending on which diesel you go with, I know for a fact that 4bt alone can be expensive and hard to find, and it only makes about 130 hp).
So here is my summary. Obviously I have stated my opinion on the 2f. I think that motor sucks regardless. It's a tractor motor, and it's pretty good at being that. It makes a lot of torque. My 2f got me a lot of places. I have nothing against diesel swaps if you really want a diesel. For practicality purposes, I think it's tough to beat the small block v8 swap.
(For the record, I didn't even do a small block tbi swap, I put a carbed 454 in my 60, so I guess its okay to not follow my whole "practicality" logic here)