ditto,,If they dont know LS engines dont take it to them, You could be asking for disaster. If he doesnt have access to the deck height spec,, how will he know any of the other critical measurements. when I built my 383 MY machine shop didnt really deal with ls engines much, but he had a book with all the specs. I paid 120 bucks to have my callies crank completely checked, He said it was perfect, And it was except for the reluctor wheel that was dinged, He knew nothing about. Had he known LS engines He would have checked the runout and caught it. And I wouldnt have spent countless hours troubleshooting and then had to remove and disassemble my new engine because a reluctor wheel with more than .020 runout will keep your engine from running. The point being take it to someone who knows these engines.