I use my stock tank with a 3/8 pickup and line on my 63. I use the Holley black pump and when I mounted it I found out its very hard to try and mount it lower then a stock tank as it would be to close to the ground. Mine is mounted about level with the tank and works fine for me. It works good enough to run 10's with no fuel starving problems at all. Only problem I had was this pump gas fuel boiling in the carb and flooding the eng but it looks like I fixed it as I ran my fuel line in the pass wheelwell and took it out from running along the frame rail under the hood. Now it runs along the top of the pass wheelwell and comes in thru a hole in the fenderwell and has seemed to cured that. I wanted to stay with my stock tank also so my fuel gauge works good. Ron