When I had issues with the engine in my dozer and then later on in my dump truck, I tried everything I could think of to avoid doing it right. I searched and looked for anything that could possibly create the problems, then spent the time fixing those things with the hope that it would solve my bigger problems. I don't know for sure how much time or money I wasted by doing this, but it was significant.
In the end, I had to do it right and deal with the expense and time that it took. It wasn't fun, it wasn't satisfying, it wasn't anything good. But it's done and I'm glad to be over those issues. When I want to use either piece of equipment, I can without worry that it will break down, not start or not have enough power to do the job.
I'm not sure what an 1100 is, other then a Ford tractor of some kind. I'm guessing that it's got a few years on it and probably never had any major repairs or issues before? Being old, the head probably has considerable wear to it. The valves and valve guides should be replaced. The head should be resurfaced and the injectors replaced. It will add up to allot more money, but you will have a stronger, more reliable tractor for it too. If the head is off anyway, then it's sure a shame not to do all you can at the same time.
At the very least, have it boiled or dipped, to clean off all the build up that will be on it.
Good luck,
Eddie