Motor plates when run on the street will cause viberation from the drive train that the rubber mount usally take care of.Pulley out of line put a electric water pump on or a elactric water pump drive on it.
I made a spacer that went behind the crank pulley. If the motor plate is 1/4" thick, the crank pulley spacer needs to be 1/4" thick. Of course, you'll need to space your accessories correctly too.I was just taking a look at a few places that sell front and mid plates for my small block, and they all seem to say that they are for drag use only. Is there any truth to that, or are they just saying that to cover their asses? And one more thing.. How do you guys deal with the water pump pulley being out of alignment with the others? (once you add the front plate behind it) TIA