Since my boat has been sitting for so long and the fuel lines look like the are the ones that came in the boat (1990) I am going to run all new fuel line from the tanks to the carb. Currently everything is 3/8" ID from the tanks to the carb with hose clamps. My plan was to run 8 AN PushLock (1/2") line from the tanks to the valve and run the same size from the valve to the fuel/water filter then to the mechanical pump. Then run 6 AN from the pump to the regulator and the carb. Currently building for NA 600-650 HP for now but will be upgrading to something forced down the road so just trying to plan.

Also what would your recommendations be for carbureted 548 BBC 10:1 pump gas, hydraulic roller. I was planning on a dominator and single plane but was told by a few people that is too much carb for my kind of boat and driving (30ft deep V Advantage single motor). This will also be a Tahoe boat so high altitude. Looking at a 850 demon on a Edelbrock Dominator R as a possibility.
Thanks
Scott