New member here,so bare with me.I have a 84 4x4 1/2 ton SWB chevy.I've bought a new gm 350 crate engine from Gilbert Chevrolet in Washington,swapped out the two headlight grille with the four headlight grille from a 87 suburban, and many other odds an ends.My question is, i bought a new 3 core radiator from LCM to replace the original 2 core radiator and can't get the top mounts to mount properly.I've bought three different sets of rubber pads, no help.Are the top mounts for a 4 core radiator the same for a three core radiator.Any advice?