As well as the tips provided so far, I would suggest that you check the static timing (belt, crank, cam, pump) and replace that timing belt and idler before you make anymore high rev cleanouts on the fuel system. If you throw the belt you won't have much left to work with. These things will run forever except for those that are not serviced in this way. More good engines went for scrap than you could count just because people were neglectful of the timing belt.