Low5.0. I understand where you are coming from. If I walked up to a 67 fastback with a SBC I would probably flip. But 5.0 mustang are dime a dozen in chicago. At any car show there is 3 408's, turbo stangs everywhere. Lots of 60's stangs with 351 or bigger. I got to the point where polishing everything and stroking it out was going to put my in the middle of the pack. Plus at a reasonable budget. A 347 stroker motor and porting the heads I had. Maybe a bigger cam too was going to net me around 350-370 rwhp. Alls I have to do is put the free cam in that I got and Im at that with a motor that will get over 20 mpg. I know no one is getting those kind of number out of 5.0's. Especially one that gets into the 350+ rwhp range.
Other then being brand biased. Whats wrong with it when it comes to a fox body.