JDMopar said

Pull the engine so you can pop them all out, and then pressure wash all the nasty crap out while you’re at it. There are 2 in the back of the block, and then the 2 in the back of the heads that will all be much easier out on an engine stand. I had to do the same thing with a 71 Challenger once, and it snowballed into TTI headers, a 727 transmission, 7 1/4 to 8 3/4 swap, a new cam and a D4B intake I had laying around.....lol.

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