I ran port injection on my Duster. Really no difference in power for the average street engine between port injection and throttle body. The EFI setup on my Duster cost about $10,000 while the Sniper setup on my Coronet is around $2500. The Coronet engine actually made a little better power than the Duster engine. The port injection systems are probably higher quality and more reliable than the Sniper setup but there is a lot of cost associated with going to port injection.