Most big block cars were 427s. I have heard that some cars came through with top oiler blocks, but were still 427s. The 428s came in some of the street cars, with an option for the 427 (although they didn't quite make that too public) and then they went back to 427s for the rest of the run because of the complaints.
I am sure Ron probably has more detailed data on it, but I can assure you that more then 8 Cobras had 427s
.
__________________
Sal Mennella
CSX 4241, KMP 357 - sold and missed, CSX 4819 - cancelled, FFR 5132 - sold
See my car at CSXinfo.net here >> CSX 4241