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And major Props for keeping the LQ1 man. Maybe you’ll be able to put collector plates on it? Not sure how the US works that out but should be cheap insurance if you can.

I imagine the engine is completely intact? If it was running well when you pulled the cradle I’d check for leaks and leave it be otherwise. check: the timing belt condition. If it’s frayed or showing it’s age, or any cracks, replace it. So much easier to do out of the car. pesky distributor o ring is a leak nightmare but if it’s dry leave it. It’s under the plenum and serviceable in the car if it does leak. (Search - there’s a sticky) Did the exhaust manifolds leak? If so replace the gaskets while it’s out. did you measure the charging voltage? The alternator is a bit of a bugger to do in car so change it if your doubting it. Change out the coolant lines if they’re spongy or oil soaked. Check out the vacuum lines Really you’ll want to inspect it carefully for anything that looks ratty, and write down or take pictures of any leaks, and wash it till it sparkles. Inspect again and replace what looks suspect. Rockauto is your friend. If you change the oil before you should you’ll find they’re tough engines and only have issues if you drive and ignore. They’re surprisingly easy to work on. Once you get to know the engine and you have to go back in later it’s not a big deal if your mechanically inclined. You got the cradle out without issue so you must know what you’re doing. order a set of GM manuals off eBay for your year and make, easily found and cheap. Way more info than a Haynes or clymer. https://www.ebay.com/itm/141919682790?hash=item210b1280e6:g:TQMAAOSwWTRW2IYH

Hi everyone, I just had a few questions to ask you guys. I am picking up a 92 Grand Prix GTP next week to modify my 92 Grand Prix SE with and I was wondering if any of you knew if it is possible to wire the heads-up display that came in the higher trim levels into the ones that did not come with one. I am not very concerned about the trip computer and information center since I don’t want to go to the trouble of tearing apart my entire interior. I planned on swapping the dashboard anyways because the new one isn’t cracked the way mine is. If anyone has any info, it would be greatly appreciated.

It is possible and others have done it. Your car might be pre-wired for HUD and a DIC. When you take the dash off to replace it, you might find the wiring harness you need. If not, wiring in a hud and dic isn't that difficult to do. Lots of resources on this forum if you dig around a bit.

So, I am sure alot of you have moved on to other posts, I have put alot of thought, energy, and spare time with basic tools. I decided, after alot of research, the LQ1 is going to stay and I purchased a used transmission with a warranty. I have cleaned the engine bay and am going to detail the engine and bay. What preventative maintenance should I be doing while everything is apart? Is there any performance/reliability issues I can correct or add while I have it this broken down?