These pictures illustrate clipping a 47 to 55 Chevy truck frame with a 78 to 87 G body(Monte,Grand Prix,Cutlass,Regal) front clip. These steps can be used on other frames,but will not be exactly as illustrated. This job requires good welding skills and experience in fabricating.
DOING THIS JOB WRONG CAN KILL THE OCCUPANTS OF THIS
VEHICLE, AND OTHERS INVOLVED AT THE TIME OF FAILURE.
If there is any question about your skill, find a competent person to assist you.
Step 7
 This is the way it should look from the top at this point. The outside of the frame is to the bottom of the photo. Notice that the frames sections do not have to line up as that is not critical for this type of installation, this will be clarified later.
Step 8
 This is the way it should look from the side at this point. Notice that the frames sections do not have to line up as that is not critical for this type of installation, this will be clarified later.
Step 9
 Cut a 1/8" plate, with a shape that will give a good transition, from the front clip, to the original frame. Tack weld it to the frame clip, and bend it in place with a C clamp, so it can be welded at the rear. There will be gaps in the middle, don't worry at this point.
If there is any question about your skill, find a competent person to assist you.
Step 10
 Cut a 1/8" plate, with the same shape as the plate you made for the outside, to box the inside of the frame. Make it go about an inch farther back at the rear, and trim the front to fit around the lower A frame mount. Tack in place.
Step 11
 Recheck all measurements again, correct any that have moved. Weld the box plates to the frame sections, and make filler plates to bridge any gaps inside the box plates. Weld these solid also.
Step 12
 Cut a box plate for the top of the frame splice, and weld in solid. Trim off any frame that sticks down below the side box plates, and make a box plate for the bottom. Weld this in solid. Finish the weld as necessary, and paint.
Step 13
Reinstall the jig
(This may require some trimming on the jig as the new section of frame now has the spring pockets and a-arm mounts included, DO NOT allow the end of the jig to move as you trim it.), add the pieces that will get you around any suspension pieces before you remove anything, and trim the clip to give clearance for the bumper and core support. The original frame horns flipped side to side will work for mounting the bumper, and a square tubing cross member can be fabricated for the core support.
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