Hello all,   Hagerty member and first time poster here with a question for the masses:   I recently bought a '57 Canadian Pontiac 261 that I was planning on rebuilding.  After pulling the head, I found two blown cylinders (likely from not drilling the steam holes in the 235 head).  When is it worth having a block sleeved?  I was planning on rebuilding this for my '48 Chevy pickup and 261's don't come up often, especially for the price I paid.   Thanks! ... View more