Just brainstorming a little, has anyone tried turning the manifolds around( passenger to driver and driver to passenger) to run single turbo in front of the engine. Looks like he oil filter is in the way but a remote filter mount might help that. The power steering pump may have to be moved. Just wondering if anyone has looked into it.
The main challenge with the single turbo option is finding space for the large turbo and plumbing. Twins are easier to package...
I did exactly what you are thinking and worked out ok. I haven't been on here in a long time and I seem to have lost some pics, but I had a gt45 on the pass side and the car ran well till out of no where it started smoking out of every hole lol. So now I'm debating ls swap or re ring it and try again.
re ring it and be sure to take a bunch of pics of your setup. LS engines are great but the buick 350 can make good power in stock form with boost added.
Or, you can do what i did and use the stock manifolds in their original position and have the exhaust pipes go under the front crossmember to wherever your turbo is.
I did an LS swap with my old Chevelle but didn't have the funds to turbo charge. I took a stock 5.3 Gen III, put in a $120 dollar CompCam, some pistons and new rods. That with the JBA headers and cold intake kit I got 400HP. Didi all the work myself and it cost $3,800 when all was said and done. That was a fast, cheap engine. Been toying with the notion of doing this in a year or so with the Skylark - I don't know. Those turbos look sweet! Be sure to post lots of pics.