IF you do opt for a blocker plate and do it yourself be sure and surface the plate, I took some 320 grit sandpaper on flat spot on my bench and flattened it. I was not surprised how flat it WAS not. PBlaster or a 50/50 mix of acetone and transmission fluid works best on the nuts.
Don't laugh at the string, you drop that wrench and it might end up behind the down pipe heat shield never to be seen again till you replace the stock down pipe, I just purchased it from Harbor Fraught, cut one end off and bent it to work better.
Here is a video on how to loosen the nuts with a ratchet strap.
https://www.youtube.com/watch?v=NR76vtytQlY
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Be careful at both of these fittings, they can be cracked easily and you wont know till your low on coolant. The two just above transmission fliuid stick
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Here is a backside picture of the engine, helps to know ahead of time what it looks like back there...
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