Captainkirk heres some cleaning up on a small block. It still needs to come apart for tanking, cleaning, and machining. You can see the cleaned up lifter valley return hole. I did all of them the same way. Also clean up the casting parting lines to reduce stress risers. Use the same tyoe of carbide burrs you would use for head porting.
View attachment 1715688670
View attachment 1715688671
View attachment 1715688674
View attachment 1715688675
View attachment 1715688676
View attachment 1715688677
View attachment 1715688680
