well, as time has passed my motor has gone threw good and bad, and yet now is the time for me to make a choice to either buy a used motor or rebuild my motor. Now my friends are telling me to buy a D16zc motor, and yet im not to sure of even buying one, but my close friend told me that his friend owns a shop, and he can rebuild my motor for 800$ bottom up and add in ZC parts to give it an high compression. But again im not 100% sure on what to do. Should i rebuild my motor and have 0 mileage? or buy a used motor with around 50k depending if i can find a good one. Right now all im going for is more HP, but still be able to pass smog too.