Cleaning engine Bay

[Mr. Tasty]

I just bought an 87 eta, and the engine bay needs a complete detail. What will I need to cover or avoid water with? I am used to cleaning newer car's engine bays. Thanks

[CabrioPunk]

Diagnostic port (the round thing up front with all the pin locations) and to be safe the fuse box. Otherwise - like all engines - just let the product work rather than trying to blast off the gunk with 3500PSI.