Ok, so i have a question. My d15b7 is on its last leg. I have my tubo motor that is finished just waiting on the injectors and S300. I have a built D16z6 that is complete but it has Vitara pistons and Std. lengeth Eagle rods so the compression is REALLY low. if my motor goes out can/should I drop this motor in? How will it drive (or will it even drive)? Dont want to waste 100-200 bucks on a block to replace it when i can use the cash for the s300.