Does anybody know anything about these performance engines being sold on Ebay ? The prices seem too good to be true(a 328 hp 302 for $2600). I searched 302 Ford on Ebay motors and there are several outfits selling the things.  

Sorry, we have no experience with them. I would look long and hard at the parts being used, shipping costs, and any warranty (and how you utilize the warranty) before clicking the "buy it now" button.

Some I'm sure are legit shops just selling on ebay (look for full contact info with phone, mailing address, etc.) and others are probably more fly by night...

HTH...
Mark