Isn't the PC1 for a small VAM? I could be mistaken. Measure the outlet on your VAM. If it's 3" in diameter it's the preferred big VAM. The small VAM is either 2-1/2" or 2-3/4", I can't remember. The computer in the TC is definitely for a small VAM so there's no advantage to removing it. There's an LA2 and big VAM for sale on Ebay right now but his BIN price is kinda steep. He's taking offers though. $90 would be a fair offer. Keep the computer and resell the VAM for $40 or so.
That's the computer location in all Fox bodies. It's been awhile but I think there's just 1 10mm bolt that secures a plastic bracket that holds the ECU in. Remove it and finesse the ECU out. The connector just plugs in. You have to wiggle it free.
WOW! That is truly nasty!! Looks like the manny actually broke in half and then Bozo the clown welded it back up! See if your machine shop can pressure test it. If not, I would grind that weld down and then have a good welder reweld it. As long as it doesn't leak it should be OK. The TC manifold is an E3. You don't want it. Try to repair the Bob's log.
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Trust in the Lord with all your heart and lean not on your own understanding.
Proverbs 3:5
1989 Mustang convertible w/built and turbo'd 2.3.