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Forum: Pontiac - Street 11-16-2019, 09:40 PM
Replies: 62
Views: 5,508
Posted By LATECH
9778789 block is for 65-66 389. My 65...

9778789 block is for 65-66 389.

My 65 block (9778789) has been bored to 4.120 from 4.0625. Runs killer.

No cracks. No problems. I have pounded this motor for a few thousand miles now and...
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