On page 20 of George Reid's book, "High Performance Ford Engine Parts
Interchange", he states the following:
"Though 302 blocks looked virtually identical to the 289 block, the cylinder
bores had extended skirts to handle the 302's .019-inch longer stroke. This
extended cylinder skirt reduced piston slap and improved stability for
quieter operation."
On the same page under a photo caption he also says:
"The 302 block differs slightly from the 289, yet both are interchangeable.
We suggest the use of a 302 block with 289 internals, but not the 289 block
with 302 internals, due to the increased stroke. The 302 block has slightly
longer cylinder wall skirts to accomodate the small increase in stroke
length. This reduces piston skirt noise and play at the bottom of the bore."
Caveat emptor.
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