Would a 351W work well with a GM Turbo 350 or Turbo 400? I'm eventually going to swap out the Chevy 350 in my 62 F100 and throwing in a 351 but I still want the torque of a GM transmission, but the only adapter plates I can find for a Ford motor to a TH350/400 is for a 5.0 302. Any help would be appreciated.

 

What do that mean. .does it have steeper gears than a C6? Why not swap in an AOD while you're at it and get overdrive.

The 351w uses the same bolt pattern.

 

Why bother taking out the 350. With the money wasted on the adapter plate you can hotrod the Chevy to be a nice engine. Even if your 350 is bad, unless you have a mint 351 it's not worth it.
A c4 and th350 are about same strength stock, and use similar hp to drive them. Then the th400 and then c6. The aod is a temperamental trans but for something over 4000 lbs I don't like to recommend them. They use a little more hp than the th350 I think.
Unless you're going to put a 4l60 or 4l80 into your truck, don't bother mixing and matching engine/trans of different makes. Maybe if you had a built 351 and a built 700r4 I could go along with it, but th350/400 I can't.

Like was said, all 302-351 bellhousing will interchange, and flex plates interchange with correct balance.