[redmt]

Originally Posted by Barry_R

We check them all...

Dakota Ultrasonics PR-82
not a super high end unit, but not a Chinese ebay bag of dirt either

http://www.dakotaultrasonics.com/prices/PRpx090113.pdf

You missed my question,,,, are you finding 105 blocks that fail? I've never seen a standard 390 block that would go to 428 bore. I've never seen a 105 that didn't.