The hardest part is cutting them straight. I placed a piece of PVC pipe over the cone as a guide to mark my first cut. I also took the crossmember off of the car so I didn't have to cut and weld while standing on my head.
Tip- leave the bumpers on when you make the first cut, then use a lot of silicone spray lube and carefully push the bumper out from the inside (I used a blunt screwdriver to push the rubber back into the hole). After welding you can lube up the bumper and pop it back in.
Tip #2- While the crossmember is out of the car, you can clean it up, weld the upper crossmember tubes real good (they aren't welded too good and tend to break loose over time) and paint it.
1986 SE Aero coupe.
3.4 DOHC swap is complete and running, now just have to finish the rest of the car...
[This message has been edited by tesmith66 (edited 11-01-2013).]