First try going to fedex or ups and put that 6ft long box in your car. Box was trashed. And if you noticed the scratches you should have mention something that day. Wrong thing to do to when you got rid of that chipped p28 unless you like less HP and lower rev limiter. How long ago was this anyways. Good luck to you and your car.
If you think $300 is alot. Inline sells them for $350. So it's really not alot. You just got lucky on that p72 for $250.

PS: I am not asking you for any money, relax.