Ok, here's what's up. The spare engine that came with my 260 has almost no compression, but the engine in the car now has great compression. About 175-185 across the board, most being 180. The head on the spare engine looks brand new! Even have a performance cam, springs, etc. I want to put the good head on the spare engine on the good short block in the car now. So when I get ready to put the good head on the car, what do I use to keep the timing chain from slipping. I'd really hate to remove all the stuff to put the tensioner back in. I saw one design for a wood tool, but it didn't give the measurments for where the hole goes... If anyone knows where I can get one, or how to make a good tool (that would be even better) give a shout out. Thanks!