I recently bought a 68 convertible and I'm trying to determine what engine the car originally came with. It currently has a 67 396. I removed the gas tank, but found no tank sticker. It has original front and rear sway bars, 7 leaf rear spring, the tach has a 5600 rpm redline, differential is code AU, muncie 4sp, the fuel line has no return. Does this sound like a 390 or 400? Any help would be really appreciated. Thanks Scott.
68 427/400hp original engine?
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