[rritchey]

Steve R.

When you sleeve a 427 down to a 428, you have to use the thicker sleeves that are made for repairing a cracked cylinder. If you try to put a 3/32" thick sleeve in a std. bore 427 it will just rattle around in the bore. The thicker ones require about a 40 overbore (as I recall), but once you have it in there you will never have to bore it any more and you have tons of cylinder wall thickness. I have never done this myself, but evidently it works well because the racers used to do it a lot.

About your block with the "nick" in the cylinder, It is real hard to say without seeing it but several things come into play. If the scratch is up in the top of the bore, you might have problems. If it is below half-way down, you might not. Seeing as it is not vertical, you might be able to get by with it and not have trouble. If you can hone it and the edges of the scratch are smooth and won't hurt the rings as they pass by, you should try running it. Again, this is assuming the scratch is far enough down in the bore. If it is up high, the compression will have the ring pressed out against the cylinder and the effects of the nick are greatly increased.