Originally Posted by Micah Beaulieu

I got a 1990 cavalierz24 with a 3.1 mpfi v6 and what i did for a lil more usable power is i put the heads from a 3.4 on the 3.1 bumps the compression from 8.9 to about 9.6 and swapped the injectors from a 3.4 to m
the 3.1 just have to get a few adapter parts for the fuel. And put 3.8 superchager voil packs on with new plugs n wire got a lil better power change out of it and stripped off ac and power sterring pump to free up power and did a custom exhaust from motor all the way back getting i would say about 185 ft pounds of tourqe and so.e were arou d 150-160ish horse thats without a computer tune for the new heads n injectors