I have determined that is about time to re-build my 280 due to the fact that it has an estimated 200K to 300K on the motor. I'm the 6th owner of the car and I wanted to beef up the engine a little. I'm going to have the head ported and posished but am not sure for top or low end, along with a ram air system (for on the freeway), but I have been unable to find a reasonably price rebuild kit. Before I order the kit I was going to go with a larger compresion ratio, but is it worth the extra money. After all I'm building the car as a everyday driver, but to appear to be a road rally car. I'd like to know if anyone has any info on engine rebiuld kits.