A rear steer Camaro/Nova clip works better than a front steer as you don't have to hack up the sheet metal to clear the steering box and the stock Merc core support sets right on the cross piece in front of the crossmember that holds the sway bar. If you cut the frame just behind the stock crossmember the Camaro clip will slide inside the frame rails of the Merc and the back end of the stub will meet up with the Merc's X member with some simple trimming. That lets you weld the subframe at the front and at the X member and unknowing eyes look in and don't notice that it has been subframed. I put about 80K on that setup using the Merc as a daily driver most of that time with one trip to Texas and Bonneville in the process. OOPs Jean sent me to town for stuff for dinner at half time. Baylor women are ahead of Stanford. I did that subframe job in about 1984 or so and as I said before the front end on the car was shot and I think there was a crack or two where the crossmember connected to the frame. As I've said many times I don't advocate frame swaps or subframe swaps unless what you have is junk or just flat missing. Junk can mean rust, bent, previous owner did unwise mods or just flat worn out to the point where it isn't productive to try and rebuild it. Personally outside of way oversize wheels and little low profile tires, using air bags to be to Lay frame is the silliest thing I think a guy can do with a car. If I live to be 90 I'll never comprehend how having your car lay on the ground with the front end looking broken with the tires leaning at an angle is cool or good looking. Explain that one to me so I can understand it if you can.