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I will post the SS link when I get home and the parts. You need to know of you have non top stops or top stop injectors
Top Stops are # 3046281
Non Top Stops #3054250
If you have non top stops and you want to switch to top stops you have to get the different hold down retainers and new fuel...
Follow the procedure for the running the overhead on the NHC250. It is in the stickies of the 5 ton section. Or here
https://www.steelsoldiers.com/showthread.php?115113-Top-Stop-vs-Non-Top-stop
there..
By the way. No bother cleaning the injectors if you pull them and replace the O rings...