Guys, I have sold my LS 6.0 408 and now I'm ready to upgrade my engine. But, I'm having a little difficulty deciding on which engine to buy. Therefore, I have turned to the brotherhood to help me decide and wiegh my options. My two choices are the LSx 376 long block that GM sells and top it off with a Magnuson TVS 2300 or the MAST LS7 427 or LS7 440.