97 F150 SC 4X4 Engine Swap?

[KMorgan]

I imagine this will be a broad question. I have a 97 F150 Supercab 4X4 with a 4.6L engine and manual transmission. The engine blew at 105K miles and considering a engine swap. The truck is in great condition and otherwise mechanically sound, I can't justify paying 25K+ for a new truck. I have been thinking about putting in a 5.4L but reading a lot of threads here and elsewhere, the 5.4L will not give me a considerable performance over the 4.6L. The truck is used mainly for hauling hay and pulling a horse trailer (trailer+load= about 4000lbs).
So I guess my question is what is my best engine option for the least complicated engine swap? Going from a 2V to a 3V will not be an option due to the complexity. Also what tuning will help for better performance? Thanks!!