thanks pat Do you wryte books about pontiacs or is that your brother?Seriosly,the v6 90 degree chevy do not seem to rev. like a v8, It appears done by 5500.Is that because of head ports,crank degree of firing or something else ,I DOHT KNOW ALL ABOUT THE DIFFERENCES BETWEEN 6 AND 8,I may be looking for something more complicated than it has to be. thanks hil the geezer