My MMR 4.6 Street Mod 800 Shortblock arrived at DYNOSPEED Racing the other day and DYNOSPEED came and picked up my car to do the install. I basically spun a bearing on my stock block and so I ordered the MMR with a 9.5:1 CR to go with my Vortech and Paxton Intercooler. I'll try to get some pics of it going in and the finished product when it's all done plus an opinion write up of my impression of the MMR shortblock. I think it'll be great even though I know some others here disagree. All I can say is that it better because this is my third engine but my first MMR anything. I'll keep you posted.