wow, when I had my shortblock on the stand, there wasnt ANY ROOM between cyl... that means no oring HG's... also means no room for sleeves... In all honesty, the 7m is 'OK' at best, their are too many better motors to start from, the mitsu 6g72/6g74 and the toyota JZ series are a better platform to start from, the 6G alone can take a .100 to .120 overbore, they just have more room to play being a V6 setup, 7m's dont, FACT. The 6G and JZ heads flow awesome numbers stock, 7m's not so much... For reliable 400hp and great street torque, I like the 7m, for a drag car though, 500+cube blown hemi FTMFW! Me and IJ had a great post about what the definition of a street car was, I stated that I would feel comfortable for my mother to get in it and for me not to worry about her or the car. That is a true 'street' car.