that would work

 

Mine was built with running seperate banks but only had a wastegate on the left bank. It worked but im sure its not ideal for a good turbo kit

 

As far as the divided mani thing goes on a V8 it's kinda pointless. Even if you run twin turbo's a divided mani will be a waste.

To properly run a divided manifold with a divided turbine housing runners 1&6 then 4&7 would be together on one turbo and runners 3&5 then 2&8 for the other. As you can see that would make for a mess of pipe LOL.

As far as WG's are concerned I would make it as close to the collector as possible and big enough to run the lowest boost setting you plan to run. The problem with two huge WG's are when they open they tend to expel to much gas and slow the turbine down to much and it kinda goes back and forth that way.

Two small one's would work good as well.

 

or if you run a big enough gate you can make the waste gate divided too. It makes a little more work but will help spool times.

 

X2

You can "knife-edge" the divider in the exhaust housing to help with flow...