The bore spacing on a LS is 4.400 and on a small ford is 4.380 so I can see that working. My buddy has 2 460" LS7's in his boat and has like $6,000 in custom water cooled headers! But it's well over 100k boat. I'm a poor boy from detroit that can weld/fab and make shit work. My shit box will never see $2,500-3,000 exhaust. Nordie I have a water cooled 85mm turbo getting built as we speak so the logs will be fine. Everything is going under a engine cover and wanted logs for ease of fab time and space savings. I am going to build a water jacketed y pipe to go from the logs to the turbo.