Quote Originally Posted by MOOVERMAN View Post
It is 1973 but was rebuilt in 1985. It was bored .030 and .010 on the bearings.. I am taking this engine apart. I have found the timing chain is totally sloppy it moves 11/2 inches. Thanks
There's a chance that when the motor was rebuilt, the shop align honed or align bored the main bearing bore for some reason. This will move the crankshaft centerline up towards the camshaft centerline, shortening the distance between the two and making a stock timing set chain too long, so that it is very loose like you are describing. If the shop did the work and then the fellow who put the motor together maybe used a stock timing set, that could explain it. Most timing set manufacturers make a shorter set to compensate for the shortening of the centerlines. Pat could tell you what the measurement should be for a stock block, or you could carry it to him for measuring. Just trying to pitch in and give you a hand.