100% worth it. you just need to do it properly otherwise it's going to cause headaches.
some things to keep in mind..... make sure you grind down the front corner of the bed plate so it doesn't put a hole through your brand new chamber. Also don't forget to change the jets in the carbs and add T handle tuning screws.
The hardest part will be getting the plugs out to replace the tuning screws. im sure someone has done a write up on it.
to do it properly the cost is going to be $900-$950 in parts after you factor in a flow control valve, new water line, t handle screws, primer (you have to remove the choke), and new jets.
side note! don't cut your stock exhaust hose for the 90 degree bend to the waterbox. that hose is worth like $100 because everyone cuts theirs! just buy the blue silicon 90!
definitely get a 6-12 pack and a bag of ganja like rhugo suggested