I'm getting a bit confused here... In one document, I am led to believe that the 64 500XL (390 automatic) only came with the 4-barrel carb. Yet, another document implies a 2 barrel also. Which is right?
The 390 did only come 4 barrel in 64, 2 codes P and Z. That is for 64, 65 had a 2 barrel version @250 hp's. This is from a book on reading casting #'s etc so it is pretty accurate.
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