blow through si the worst system , the carb cannot "see" the air density so it will be rich at low boost & lean at higher boost , putting the carb pre turbo works better but not I dea either , EFI is the best way to go , Mega squirt , SDSEFI , & 1 other haqve good EFI control systems , you need to plumb the exhaust to the turbo via modified headers or custom built ones , the turbos also need a good oil supply & a unrestrictive oil drain back to the oil pan , the pressurized air can be intercooled also before being forced into the engine