I agree with above. Also, 30years ago we did not know (or just started to know about)
quench area. Don’t be hard on yourself. I did a 360 .030” over and street drove it hard with 10.74 to one compression. Keith Blacks. Street fuel was better then. 34 degrees (approx) all in and little detination.
Right! Even the factories didn't know about all the benefits, because they routinely put engines together with closed chamber quench heads with pistons .100" or more in the hole at TDC.
