Posted by George on May 14, 1998 at 10:46:01:
In Reply to: 251/265 Compression Ratios posted by Dave Hamann on May 14, 1998 at 00:20:33:
Your new compression ration will be about 7.95.
Remember that the 265 engine has 1.06 more displacement
than the 250, so you new compression ratio is also
1.06 time the original 7.5.
I ran a 218 flathead (hard) with an 8.0 CR and
never had it ping nor blow the head gasket...so I
would give it a try.