I just did that to my 81 Trailcat, but it needed a good overhaul so I did it this way: remove hood, dash, seat, fuel tank, engine, all fuel lines and pump, wrap electrical connections in plastic, and tape them up, then soak engine compartment with an engine degreaser, or citrol (made from citric acid from organges), then off to the car wash, good heavy go with wand on soap setting then rinse. You might need to use degreaser again, so bring it along.
You can carefully use rags with degreaser, citrol or laquer thinner in a well ventalated area if you dont want to strip your sled to its tunnel.
Plug up your carbs, protect electrics before hand and coat pipes with WD-40 after to keep the rust away.
I did this with the sled on my 2 up flat deck trailer, saves your back, big time.
Good luck,
K
When hell freezes over, we'll ride there too.