Ford F150 6 cly mounts from Advanced Auto. They sell 2 brand names with the same part number Pioneer and Anchor. You need the Pioneer ones they are the right size in height and require only slight enlargement of the mounting holes. They are significantly stronger than OEM and so far on our race car they seem to be holding up. OEM's lasted only 1500 miles on the race car. BTW you can buy 2 of these mounts for the price of one of the OEM's and they come with lifetime replacement warranty.
hope this helps
Harry
Formerly yellowzxtt
" If it doesn't make it faster, i don't care " Please visit www.ztuner.com to GO FASTER