I finally got the info to pop upo on the website. All i had to type in was XN on the block code section and this info , along with other year engines came up. But how does this info tell me it's a four bolt BIG BLOCK? It did help though, now I know and can prove that it's a 400 and I know that the heads are the right code. Thanks! But can anyone else help me figure out what I have?
YEAR: 1973 ENGINE:400 HP200,230 ENG. CODE:XN TRANS:A CR:8.0 CAM:066 HEAD:4X BBL:1-4 CARB NO:7043264 MISC Block Casting # 481988
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