I already have a brand new harmonic balancer from a speed shop and a cover from Summit Racing. Helped a little. At least I can see the timimg numbers. White letters on a black cover really stand out. Went to do a service call and had to climb Syskiyou Summit. A long hard climb pulss a couple a steep grades and got only just over 12mpg. With a 700R4 and 3.73 with 31" tires thats not very good. Its only rated 185hp and 285 on the torque. Wasn't until 1996 that they changed the computer system and got some real power out of them. Over 300! Still have the throttling problem when ideling. Just goes up and down all by itself. Haven't figured that one out yet. Maybe a worn distrtibutor??? Chain is a new double roller when the other things were done a few weeks ago. Seems like going in circles. Timing does seem to vary. I thought the chain would have stopped that. Time for an MSD Distributor or what? Could it be the TBI? All the plugs a new and are burning tan. None are black or oil fouled. Uses NO oil. H. ?????