LT1 Crank hub wierd??
#27
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GM preformance parts Heavy duty timming set. It's a solid cam and crank sproket with a single roller chain. Stock LT1's as far as I know came with nonroller style chain and the cam sproket had 3 spokes. It is an upgrade over the stock. While you have it open line up the dot on each sproket so the crank dot is at the 12Oclock possition and the cam dot is directly above the cranks dot at the 6 Oclock position. Due this by turning the crank. Then you can verify number 1 cylinder is at top dead center and the timming was set right when it was replaced.
#29
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you will need some spacers if you do it that way. Thats how I did mine but if you pull the plugs it will turn a hell of a lot easier. You don't want to bottom the bolt out in the crank because you will F'up the threads on the bolt and when you pull it back out you will F'up the threads in the crank. Also make sure you get enough of the threads in the crank other wise you risk stripping out the crank and thats not good at all.