I have lived down the road from dove manufacturing for years and as I was reading some of these post it came to mind. They build ford 427 side oilers, 427 sohc, 428CJ's, 390's and I can't remeber exactly what all. They do alot of blocks in aluminum or cast iron. They have the rights to produce these engines from ford, with the blue prints from ford, they are even allowed to use ford part numbers if memory serves me and I'm sure it does. I found thier web site acouple of times, but couldn't find it tonight. However I did get thier phone number out of our local phone book. It's Dove manufacturing 1-440-236-5139. I don't know thier pricing. As a teenager and ford performance nut, my budies and I would go down there and lust over thier products. I know there was no mustangs that came with a 427, but there should have. You could get a single 4 barrel, hydrulic cam 427 in the 68 couger. Anyway, I thought this might be a help to someone wanting to build the altimate mustang. the 427 sohc was a 600 hp create motor and the sde oilers with 2- 4 barrels was 425 hp. They had a host of FE reproduction parts and engines. If this has been posted before, I do aplogize.