As BigBlue and DriftwoodBronco advised.
Stormfinder's 95 Frame swap into an 85
Only major diff between earlier years is that 92-96 have Convolutes in front (often called da accordion sections; it is part of the SRS Design).
Project Phoenix - Stormfinder's 4BTA Diesel Bronco...
The Body Mounts are a pia; so be ready to spend time and get bruised..
see LINKs for the mounts and other info in my site @ Loading
Cleaning & Rust Proofing
Frame Service; Drilling Precautions, Straightening, Reinforcing, Member Replacement, etc.
Differences from 80-96, Strength & Dimensions; "...This got me thinking and I just found my Standard Catalog of 4x4s book. It has info on every model year domestic 4x4. It doesn't really specifically talk about frame differences from year to year, but it does have a Chassis Features section for each Bronco year. Here's what it has: (1980-1985) Separate body and frame, box-section welded frame. 3.95 in. section modulus (1986) Separate body and frame, single channel, 5 cross members, welded frame. 3.66 in. section modulus. Maximum side rail section: 6.95 x 2.12 x 0.170 in. (1987-1989) Separate body and frame, single channel, 5 cross members, welded frame, 36,000 psi steel. 4.27 in. section modulus. Maximum side rail section: 7.01 x 2.12 x 0.202 in. (1990-1992) same as 87-89 but also notes low carbon steel (1993-1996) Separate body and frame, single channel, 5 cross members, welded frame, 3.66 in. section modulus. Maximum side rail section: 6.95 x 2.12 x 0.170 in. low carbon steel..."
Source: by BurntOrange at FSB 400/AOD/NP205 into an '81-'86
Diagonal or X-Frame Checking Method
NOTE: An alternate method of checking frame alignment is to use a frame gauge.
Frame alignment can be checked without removing the body from the frame (5005) by using the diagonal or X-frame checking method.
This method should be used to identify misalignment prior to any attempt to straighten a frame.
Place the vehicle on a clean, level floor and set the parking brake.
Select at least four points along the left frame side rail (5015) and transfer these points to the floor with a plumb bob. If desired, paper can be taped on the floor along both sides of the vehicle below the frame. Mark the points on the floor as accurately as possible.
Locate the corresponding points along the right frame side rail (5016) and transfer these points to the floor in the same manner.
Move the vehicle away from the marks on the floor, and measure diagonally between all points on the floor. Both measurements should be equal within 6.35mm (1/4 inch).
Measure between corresponding points parallel to the frame side rails. These measurements should be within 3.18mm (1/8 inch) of each other.
The squareness of the frame side rail web to the floor at the spring hangers and at the steering gear mounting location should be within 1.59mm (1/16 inch). The squareness of the frame side rail web to the floor at all other points should be within 3.18mm (1/8 inch). The web and flange should be square at all other points within 3.18mm (1/8 inch).
Any point on one side rail should be within 3.18mm (1/8 inch) ahead, behind, above, or below the corresponding point on the opposite side rail. The frame side rail should not be bowed more than 3.18mm (1/8 inch) for each 2540mm (100 inches) of frame length. The overall width of the frame should not vary more than 3.18mm (1/8 inch).
An alternate method of checking frame alignment is to use Rotunda Laser Measuring System 073-00451 or equivalent.
Before checking frame alignment, inspect all frame members for damage, cracks, twists, or bends.
Check all welded connections for cracks. Inspect all rivets, bolts, and body support brackets for looseness
If a damaged frame member is to be replaced, new bolts, Property Class 9.8 metric (Grade 8) fasteners and rivets required for replacement of parts should be of the same specifications as the original bolts or rivets. In cases where it is necessary to substitute a bolt for a rivet, use the next larger size bolt.