Fyi, I am second owner of this z. I bought in 1988 with 80,000 miles on odometer. I have since put on 320,000 miles. Odom just turned 400,000 miles. Auto tranny has never been touched. I had a new Nissan engine installed in 1994. So this engine has 180,000 miles. I currently am getting 155 psi in each cylinder. I think that's about 90% of new. Just passed my CA smog. People luv Z's. Yes, it's worth it to restore. Yes, it's been in the shop many times but no single cost has been too great. I have no plans to sell it. Happy trails.