V-8.....I don't have the part numbers for everything....some of these things you'll just have to call and ask for. One of the advertisers that I mentioned up front would be able to help you out with anything or any question that you have. Or you could just call Jegs or Summit Racing and order the Ford Racing part # that I showed you. It's easy....
Go to :
www.summitracing.com
Then click on manufacturer's part #. Then choose Ford Racing in the box.....and put in the part # that I typed above. It's $1371 and should ship by the 19th. You can order it there.
If your mechanic advises a 393, then why don't you just let him order the parts and deal with it?