Well, I asked a guy about his item on craigslist-
http://detroit.craigslist.org/pts/438073964.html
"Is this the 450Hp or 502/502 version?"
I figured this was a reasonable question. I'm pretty sure 8.75:1 compression is for the 450HP model. I received a reasonable answer.
"502/502"
This is where it gets funny. I asked the guy a couple other questions.
"Is it still under warranty? What is included with the motor?"
I figured both questions are important. Here is the reply that I received......
"WTF read the ****ing add pal
what is this the supidilty of general public? are you just lookig for convo?
**** you i wont sell it to you dip ****"
Bwahaha, I found this very amusing. The best part is I am not window shopping, I was strongly considering this purchase. My favorite part is "supidilty." I think someone needs a hug. Oh well, made for a good laugh.