i used an oil pan, a gallon of gas and a good brush for the plenum to get the big stuff off and carb/throttle body cleaner for the rest.
i also scraped the shit out of a lot of it with a screwdriver.
looked like this:
here you can somewhat see it cleaned(forgot to take pics):
make sure to get a new plenum gasket or some grey rtv(i used leftover honda-bond)