Rawkkrawler,
Lots of good info here, lots of not so good info here.......
You can tell what crank you have in the engine by measuring stroke, use a coat hanger or similar down a spark plug hole to measure from bottom to top.... 428 stroke is unique and much different than a 427. 390 stroke is same as 427.
Bore is a bit more tricky! I rely on casting numbers on the RH side of the block to tell me "most likely" what I have.....I didn't notice casting numbers on your block pictures, so you could have a 428CJ. Many were cast without numbers! Check date codes too! Those are located over near the
oil filter pad mounting location. Dates and casting numbers can help drill down a most likely suspect...
As for the whole four bolt 428 thing, yes, Ford cast many many 428's and 390's with the 4-bolt provisions on the bottom end, but the blocks were never machined to accept the 427 style caps. Gotta remember that the casting molds were something that interchanged from one FE type to another.....and guys will be guys....and weren't gonna wait around for the "correct" sand insert if the 427 one would work.....production line "deviations"!
Once you have numbers, you can look them up on the web, or in the "How to rebuild your big block Ford" book for FE engines. Good stuff in there!
Good luck!
Steve
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