gotta disagree, the clear cut answer for both is 1) bk9 2) fox body 5.0 mustang, lol.
I'm guessing this guy may have got his feelings hurt and left, or maybe he was a troll.
The Fox bodies weren't bad but I'm going to have to go with a '94-97 F350 crew cab 4x4 with the 7.3l Powerstroke diesel engine and a ZF5 5-speed manual. With the 4.10 gear ratio and limited slip diff of course.