I recently purchased a 65 cobra replica with what I thought was a 427. After educating myself(does not have cross bolted mains bearing caps) I had some doubts so I pulled the
oil pan. The crankshaft has a casting number of 1U and the block has reinforced main bearing webbing. This leads me to believe the engine is a 428CJ. I bore scoped the top of the pistons and have found that they are .030 over pistons.
Other info on engine: date code on engine is oct 15, 1968. No engne Casting number, push in freeze plugs, aftermarket cam(no idea of specs but sounds nice), forged pistons. That is all I know so far.
My question is: which engine is more valuable 427 or 428CJ?
Thanks for the help.