I went with an RRS power unit. I am pretty happy. I think the power, or not power is a big question though. I'm still wondering whether I would have preffered no power, for the same reasons you are asking yourself. But I think that power is the way to go.
1967 FASTBACK, Raven black, 347 stroker 430HP, Holley AED 650 Torque Thrust D's, RRS rack & pinion, Randalls steering pump, Heidts adjustable valve, Headman Headers, Magnaflow , Tremac 5 speed, Hydraulic clutch, KONI shocks, Alpine 9855 tuner, JBL Baselink ampli, Optima yellow top, Ultra comp Autometer guages, 240KMH speedo, Subframe connectors, traction bars, EBC Redstuff
1966 FASTBACK GT K code. entirely restored...shelby drop konis, michelin pilot tires, USA 66 radio