no,the 4cyl pilot bearing won't work.look on ebay or do a search.some say it's a diesel ranger or a mazda p/u bearing.the outer diameter of the 4 cyl. bearing won't fit in the 5.0 crankshaft.
did you all NOT see what my reply says right up top before you even asked?? I'll get you the Timken part number tomorrow if you need to know more info but I thought I was pretty clear about it. I got a 1978 mazda 4 banger pickup bearing and it works perfect. And correct... the 4 banger mustang bearing does NOT work because the hole in the crank is much smaller on the 4 banger which makes the whole bearing waaaay too small to go into the back of a 5.0.