Hot water is better, IMO.

One thing about Gunk is that it really takes off the goop and oils. This leads to metal parts possible getting surface rust quicker that aren't painted, which is why I follow up with a quick WD-40 dusting. This also serves to repel water later on. Granted, it does allow for dust to adhere to it more easily, but them's the breaks. It makes the engine look spanky new.

As for that engine, it's a 2110cc motor with Pinto lifters, a Chevy oil filter, two dual barrel carbs, stroked and counterweighted crank, larger jugs/sleeves, roller ratio rockers, chromoly pushrods, 1 3/4" exhaust, which is pretty close to the 44mm valve openings in the ported-and-polished heads.... Trust me, this sucker cranks for an air cooled VeeDub motor. It slams you back in the seat!

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2001 Solar Yellow SE 4x4 V6 5spd