Does anyone know the distance between the frame rails on a '88 to '95 Chevy truck in the area that the exhaust manifolds are located. I am going to install a TBI 350 in a jeep and I want to use a set of stock exhaust manifolds if they will fit inside the frame. The measurment I need is between the frame rails right where the exhaust pipes attach to the exhaust manifolds. Thanks for the help.