Quote:
Originally Posted by johnta1
XH was a 301 CID engine in 1978.
(that's if it is original)
Or even a 400 in 1977. As said, need the date code for best ID.
Engine Codes
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In Chiltons it says in 78 there were two 301’s available. 2 bbl, was a Y code, the other 301, was a W 4 barrel. That’s all that’s listed. This motor has the small 3/8 plugs.