I’ll throw my two cents in on the engines.
I don’t like the 302, 305, 307 etc. engines. Don’t like the RPM’s for power and the lack of torque.
My Bronco will get around 15 MPG on the highway. Never really checked around town, I’m assuming 12ish.
It has the 351, it’s a 92 so it doesn’t have the MAF system. And that’s with the E4OD. I think it has plenty of power and torque.
I’ve never owned a 300 six, but I would like too. I’ve heard them called slow or lazy, but I’m a torque fan.
Ray mentioned the 7.3 IDI. I had an 88 with the 7.3 and ZF tranny. Good engine, but I wouldn’t own one again for the reason you mentioned, starting in the winter. Started good when I had it plugged into an appliance timer and came on 2-3 hours before I left for work. You definitely have to keep on top of the glow plug system.
If I did own one again it would have a turbo on it. I live in a basin so no matter which direction you’re headed, you’re climbing and I’m already at 4200 feet of elevation. I’ve towed through the mountains, not fun.
I would like a 94-97 with a 351, roller lifters and MAF, which I think would help MPG.
If it doesn’t have to be a Ford, I’m really liking my 98 GMC.