The best valve covers to run on a EFI engine in my opinion are the stock aluminum covers from an 86-93 mustang...the same ones that Dave referred to. http://cgi.ebay.com/ebaymotors/MUSTA...Q5fAccessories they pop up on ebay cheap all the time. I've seen them painted, powder coated, chromed and I've polished a set myself before. If you have a 86-93 Mustang style upper plenum, you won't need a spacer. If you have the curved upper plenum, you will need a spacer like this one http://cgi.ebay.com/ebaymotors/5-0-F...1%7C240%3A1318 Also when using the curved plenum you have to modify the oil filler neck on the aluminum covers a little to clear the throttle body....I've done it, it's no that involved. On that cobra, you really should be using the "cobra" intake. http://cgi.ebay.com/ebaymotors/5-0-F...1%7C240%3A1318 With that intake the covers will fit with no spacers or modifications. Hope it helps.