Where can I find factory engine specs like main journal size, rod journal size, piston to bore clearance etc. ? I would like to measure the block before sending it to a machine shop.
The Chassis Service Manual has a bunch of those specs in the "Engine" section. I only own the 1968 version so I am no help for your 455...
Here: https://www.teambuick.com/reference/index.php https://www.carid.com/detroit-iron/...dgm-26.html?singleid=3324918225&url=100307436
