Diy full length subframe connectors

Sub-frame connectors are to add strength. Strength is something that almost always comes in numbers!

through the floor is best, if properly done.

typical tubing under-floor is fine too, as long as they're welded (not bolted) on, and welded properly.

some have concerns with ground clearance. If you have a GT, you already have ground clearance issues (ground effects) and the subframes don't hang any lower than the side skirts already do. On LX, they do hang-same as a GT, but now the sfc's are the lowest points, unless your exhaust is real low (long tube headers come to mind)

making them isn't terrible, but you should have access to a press and know how to weld. That, is the hardest part honestly-welding them on. I've done a bunch of them on fox body cars and a couple SN95's. What I learned. Straight CO2 for shielding gas works better than argon mix (75/25) for the mig. .024" ER70S-6 wire. Clean the original parts of the body as best you can. The MM connectors have great instructions on how and where to weld. They don't need to be welded everywhere either, just stitch welded in certain areas. The reason I use straight CO2 is that it is (A) cheaper than 75/25 and (B) more tolerant of dirty joints. Remember these cars are approaching 30 years old at their newest models (fox body that is), and in that 30 years oil has leaked into the frames, in between the folded/stacked sheet metal parts, there is dirt, salt, whatever-and none of it is conducive to good welding. Plus, it's galvanized, and in certain areas, paper thin.

I typically like to use MM if possible. They actually engineered their stuff rather than some chinese (or whatever) company that simply found a piece of tubing, bent it to "fit" and then said "goes right on". Trust me, they don't just go right on, and the MM instructions tell you what and where to adjust if needed.

Nobody made a set for a Fairmont back in the day so I made my own out of some scrap tubing. Through-the-floor. Came out excellent, and it's not 'that' hard to do, but again you gotta know how to weld. It's unnerving to cut a 3 foot section of floor out!