Hi - I am just starting a rebuild of a 256, and have come across an interesting subject in the James Eickman book that says;
"Camshaft and lifter life can be increased dramatically by modifying the block. Drill and chamfer a 1/4inch hole at the base of each lifter bore boss except for the two at the rear of the block. Then grind grooves along the boss and connecting with the hole."
Is this a standard practice with rebuilders - will it prove a benefit - do you guys normally do it? what issues may I have +
Setting up the new CAM - what actually defines the amount of backlash or end play - should the rear welsh plug be fitted first - how far in the block should it sit?
Lots of question I know but I want to get it right