Originally Posted By ccarson
My W9 360 Dakota project block is cast January 13 1971 3418496-4-360

It was sonic checked and all 8 bores ranged from .230"-.210" on the thrust side.

We bored this block .030" over and did a fill of Hard Block up to the freeze plugs before machining.
upAwesome. You should be good to go. I had a 1971 360 block out of a motor home that checked like that.

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