Thin wall pipe works well if lagged for a short while, and make sure your turbos are well supported or cracks will appear very Quickly in your pipes I use heavy wall mild as it dosen,t seem to crack as much after a lot of miles
Take tinsump off and sit engine in place where you want it then you will know what sump is needed. easy enough to make a sump to fit if need be, just got to change oil pick up to suit. I am considering dry sump then there is no hassles a little more expence, and oil tank in boot. But no oil...