Just throwing this out there . . . but I have several drop on late 80's powerheads (2.4L motors with fingerports) They will bolt up to the older mids. I also have a 1981 V225 aswell.
I wonder if the cylinders are out of round. I had heard that can be a problem with the pre-83 2.4L motors b/c the head bolts are on the cylinder walls. I'd just never run across it before.
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