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David, Jerry hit right on it. Sounds like a likely poor ignition spark problem, i.e. idles okay, but misses under load. Make sure you have the blue spark Jerry mentions. An orange/yellow spark will cause your problem. There are dozens of posts on things to do to fix weak spark. If needed, search the archives, or just scan back a few pages to find all the info. Timing is easily checked with a standard timing light. Connect the power leads to a 12V battery, and the pick-up clamp to your # 1 plug wire, & aim thru the timing hole near the starter (probably has a plug in the hole that needs popped out). That 7 degrees is at idle, ~400 rpms. Your distributor should shift the timing to 32 degrees at full engine speed. Check that easy & common stuff first before tearing into your valves. Just for the heck of it, check your firing order 1-3-4-2, counterclockwise on the distributor. These engines will run, but run rough if the order is wrong. Since your TO has been sitting a few years, I suppose it is possible you have a sticking valve. If you want, you can add some Marvel Mystery Oil, or similar snake oil, per the instructions on the can, to your crankcase, to help clean-up any died-up deposits. Won't hurt a thing, might help. George
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