Given how pristine the top half of the engine was I had to go ahead and clean out the little bit of baked on junk inside the covers, and then paint them red so it goes faster. Also got all 8 new injectors in. I thought about testing each original and only replacing any with a poor spray pattern, but the later Bosch 19lb injectors are a huge improvement according to the other Land Rover owners, with a much better spray pattern - probably won't help much with mpg given that it's a Land Rover but will improve start ups (not that this one has ever had a problem) and idle and most importantly, burn better which helps emissions. So I just replaced all 8.