I did the dry sump so that I don't risk blowing the engine when running slicks on a track day. If it was a race car, I would have lowered the engine several inches, but it's a street/track car so I kept the engine at the stock height and crossed primaries under the pan.
Note that my x-pipe fits under my Albins transaxle. If you look at the pictures above, it has a lot more space under it than most. That location wouldn't work with a Ricardo and I assume a Graz, but I'm not sure about Porsche, etc.
To fit an 8:1 within the bodywork you will need to cross 4 primaries from one side to the other. With and LS the only way that I could figure to do it was under the engine which requires a dry sump. Then you need to do some gymnastics with the long primaries on the other side to create equal length header and stuff it all into the merge collector. The correct way to do it is to have all of the primaries firing in a sequential radial pattern. I spent a lot of time with icengineworks and I was able to achieve equal length primaries with proper sequence with 1-7/8" tube (I didn't get around to attempting to step up to 2" at 17" or so which is necessary with my power level). Two primaries crossed under the dry sump and two under the transaxle.
Here a couple of pictures or an early iteration - there were many. Note that you'll need a lot of icengineworks blocks (i.e., more than one of their largest packages) because you must model both sides at the same time. As you can see I had a plastic engine block and a mock bellhousing and transaxle case all mounted to some plywood. I can't imagine trying to model something this complex on the car.
You will note that the merge collector was aft of bellhousing. It would have been nice to stuff a bunch of tube into the triangular section to the right of the engine above (i.e., outside of the angled billet pieces), but as shown below my cold air box is in that location. I was able to get it to fit but it would have been difficult to get in and out and there would have been a lot of tube in one concentrated area which would have generated a lot of heat.
As I was mocking it, I kept thinking of the "A Bridge Too Far" movie which didn't end well for the Allies...