hey all, hope you can help me out

I've got two F-body projects coming in (one '83 and one '68) that are going to require carb to EFI conversion, along with turbo. They will both need tank breather kits. Anyone have a source for a sending unit kit that has the provsion for breather lines for either year? or the other items that are needed to properly vent the tank? or tanks already fitted for sump and vent? (I've only seen a few)

I'm capable of making a new sending unit cap for the tank or a fuel sump addition, but if it saves me time, right now I'm all for it.

thanks!