C7ME-A could be a 390 or 428. The only way to know for SURE, is to pull a head and check the bore size.
But check out this link from the Ford FE forum, and follow the link for the drill test....
332-428 Ford FE Engine Forum
I'd bet it's a 390 though, if it's a 2 barrell.
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Sal Mennella
CSX 4241, KMP 357 - sold and missed, CSX 4819 - cancelled, FFR 5132 - sold
See my car at CSXinfo.net here >> CSX 4241