If you cut out most of the cylinder wall to install sleeves you have lost some of the structural support that connects the block deck surface to the lower block. If you use thinwall sleeves to get back to standard bore then maybe OK. If you are trying to sleeve to 4 inch bore there won't be any original cylinder wall left.
This is my thought. I must qualify that I have not actually tried sleeving to 4 inches so your mileage may vary. I have sleeved single holes to .030 before but not all six nor to 4 inches.
I recently cleaned out some old stuff and threw away two sets of used L79 327 standard bore pistons. I had them for just this purpose and decided not to do it. I only mention this as a possible source of cheap 4 inch forged pistons.
Last edited by strokersix; 12/22/11 02:36 PM.
