10-12 mpg for me, but I have heavy steel wheels and 33" MT's (as compared to Ricardo).
I had major issues with climbing at elevation: backfiring, sputtering, and nearly a complete loss of power (there's a thread here somewhere about it) at times. Sometimes I'd be crawling up Eisenhower at 20mph in second gear having to feather the throttle to keep my speed. It would also lose power at high speeds > 45 mph around town; just randomly cut out. And cold idle and cold driving were iffy at best.
Those issues have all disappeared since the rebuild. It still runs rough in the winter if I don't give it a few minutes to warm up, but I think that's "normal." All the hesitation stuff is completely gone.
1976 FJ40 - green and mostly stock
1996 FZJ80 - not so stock