the rails are probably the stock rails and they arent chrome they are stainless steel, the pits wont affect how they work, next if you do install the new fuel rails the only advice i can give it make sure you lube all the injector o-rings with mineral oil or vegetable oil the kind used in cooking. If i were doing it I would replace all of the o-rings (2 per injector) make sure there is no crap in the holes where the injector goes into the intake manifold and also replace the FPR with an adjustable unit
__________________ 1989 Ford Mustang LX Notchback,5.0L 5 speed
331 Stroker wuth forged eagle rotater, Scorpion roller rockers, mahle forged pistons, AFR185s,Spec Stage 2+ Clutch,Steeda Sub Frame Connectors with Seat supports,Hurst Short Throw Shifter, Mr. Gasket Hi0-Flo 180* T-Stat,Lunati VooDoo Series cam,Trickflow upper and lower intake,BBK CAI,BBK Long Tube Headers,BBK Off-Road H-Pipe,Flowmaster 40 Series Mufflers,Aluminum Driveshaft,17" Cobra R's,10000K HID's
One problem after the next !! | 
BBK Fuel Rails on 1986 Mustang 5.0 
