I guess the LF and RF means Left front and Right Front so they could not get mixed up.... Dont laugh!! The heads I now have were made with the rear oil holes blocked off for some reason. So If I put them on the wrong side I have no oil to the rockers??
Perry Stephenson
MGB GT + Rover V8
9.62 @ 137.37mph
Now looking for 8 seconds with a SBC engine
http://www.youtube.com/watch?v=nVscbPHgue0&list=UUqIlXfSAoiZ--GyG4tfRrjw