The LAST place you scrimp with a turbo system is the fuel feed. It will bite you bigtime.
Do it right the first time and it will save time and $$ doing it over.
Dual Walbros plumbed correctly will be fine.
-8an feed, rails, best regulator you can buy (I like Weldon) at the rails and a -6an or the factory 3/8 feed for a return. Make sure all of the fittings are pefect and correctly tightened...fuel fires at 58psi will take a car out.