I want to swap my current 2.0 late plenum with an early 2.0 plenum and the larger diameter inlets (trying to get more air to my Raby cam on cold start). I'm sure it's possible to do this in the car, but how big of a PITA is it? I can't recall off the top of my head if you need to remove or loosen the L/R cylinder tin in order to get the plenum off.
I know I'll have to loosen up the intake runners, and negotiating the old one off of those and the new one back on is sometimes finicky, even with the engine out. I'm pretty decent dropping the engine, but what's the quickest way here (or, the path of least resistance )?