FORUM RULES UPDATED - The forum rules have been updated to continue to provide a friendly and safe environment for our member community. Please take a moment to review the updated rules and our terms of use and privacy policy. Click here for Forum Rules which has links to the 'terms of use' and 'privacy policy'.
The 77 85 hp block is a small bore block. 92 cubic inches. The pistons are smaller. The 115 is a 99.6 cubic inch block. OMC standardized all V4 blocks at 99.6 in 1979.
