Its best to wait until a J series manual that covers your serial number shows up somewhere.
5J and 5U engine is a lot different regarding where you put the oil in, drains, water pump service, etc. Then in the shop manual the difference is greater yet. The chassis on a 5J isn't all that much different from an early 5U. I have a 5J tractor and a 5U engine running stationary. The 5J book has been just about useless on the 5U engine. hang on. The right book will turn up.
I just realized that I have a 5J series---1 to 1863 parts manual--form 9202
I paid $30 for it so if your interested in it for that amount let me know.