I have just gotten my '79 FJ40 on the road after about 8 or 9 months of work on the steering and other stuff. I drove it to work today for the first time. As background, this is a 2F with a Weber carb, headers and factory '79 electronic ignition distributor. There is also a fuel pressure regulator valve inline in the fuel line. I have a small to moderate exhaust leak that I am trying to get to, but haven't yet. I noticed today that it seems to lose some power after the engine gets up to operating temperature. It isn't really noticeable at speed, but mainly when pulling off from a stop. I also noticed it dieseled a bit when I shut it off, which I thought I had fixed by increasing the fuel pressure through the fuel pressure valve. Does anyone have any insights or ideas as to what I should check or how to go about diagnosing the problem? I would appreciate any help you can give me.