I found a York compressor off of a 81 volvo for $20. Now I cant find how to tell what stroke it is. I already looked at the write up but cannot find where the tag is. Also to look at the crankshaft how much of the compressor do I need to take apart. I want a long stroke so I hope someone can help. If the one I have is not right the guy has 5 more all from a 81 and 82 volvo. The clutch works in all of them and the inlet outlet are facing the rear of the compressor. Thanks for your help.