1st Edition Modules with 2.2 Rules?

[TyCaine]

This may seem like a silly question, but I'm in the process of getting copies of the 1st edition modules from a friend and I'm wondering whether there's much to be done to convert them to 2.2 rules?

I mean the basics I get, NPCs of basic levels just use the 2.2 stat blocks, likewise use the 2.2 stats for weapons and equipment.

I'm just trying to understand expectations for what else might need to be considered if running the modules in the newer ruleset.

Any ideas or opinions? Anyone done this who has wisdom to pass on?

Thanks in advance!

~Ty