in your case none. Take it apart & clean it & check its' clearances & run it. eats a slight bit of HP/slightly stressed the hex but that's a non issue. If you had EXTENSIVE oiling mods starting with 1/8" under the pickup to all the way thru the system/loose clearances/high rpm then you'd wanna purchase a hi vol/hi psi or add a high psi spring or shim the regular spring in a hi vol pump & if not a regular sealed power pump is cheap/adwquate but you have the hi vol in hand so I'd say go ahead & finish & get the pan buttoned up & you'll be ready to move on to the next issue. EDIT I feel that a pan cannot get sucked dry and reports of that (low psi/fried journals} are due to especially inadequate pickup/pan clearance/lack of oiling passage mods/inadequate journal clearances