Bob,
That's more what I was looking for. I wasn't quite sure about auto part weights. It has been a long time since I did any auto work, but the last thing I did was replace a starter in my '75 Ford F100 about 10 years ago. I don't remember well enough what the weight might have been, but I remember it being somewhat heavy. I just wanted to know if someone had some numbers to apply to this situation. Sounds like the 250 psf is the more likely.
Jeff Hedman