440 into a /6 duster

I have done 3 440 A-body swaps. All were 4-speeds.
I modified the v8 spool k-frame on all 3 with C-body mounts. Cutting & welding needed.
I also welded washers on the driver side spool mount to make it solid.
Lakewood bell housing on all 3. Flatten firewall to floorpan seam with hammer.
Modified the pivot point for the z-bar so it lined up with inner fender. The quality control
on the old scatter shields was crude at best and were never the same. Or it could have
been the car itself but they all needed improved a bit.
I used hooker fender well headers, B-body HP manifolds and Tti 2" on the last one.
All 3 exhaust options I used have their good points and bad. They all work just depends on what you can live with. I learned it helps to tack your k-frame with the exhaust in place and remove K-frame for final welding.
Never tried the Schumacher's myself. I did two of these before schumacher started
making parts.
Another area where welding was needed is the trans tunnel hump. I found it easier to
wait and weld this in after shifter is in to confirm placement so boot fits nice. I like the poly trans mounts.
I agree that you are not just swaping engines with our A-bodys. You are swaping
the entire drivetrains and cooling. I only converted 68-69s so I had drum brakes, small axles and weak springs to change out.
I say go for it. Just expect some difficulty's. In the end you may say that wasn't so bad.
If you are like some then you will want to try a Hemi which requires a certain level of crazy. So many more problems than the 440 swap. I'm still working the kinks out of this one. It helps a ton to enjoy the building aspect as much as the driving.