Here we are two years down the road and I have been driving my Z31, happily, devoting money to other projects and only thinking from time to time about an engine in the Blue Z31. However, I drove it to Denver from KC a few weeks ago and while it was a joy to drive, I noticed that my oil pressure was lower than I usually see on the way back. I do not know the history of the engine but the car has over 150,000 miles on it. If the engine has not been replaced....where am I and can I count on it to drive long distances? I am beginning to really think about an engine. An interesting side note: I have a 2.3 Turbo Thunderbird project MGB that will be running, probably by end of January. This engine fascinates me because that turbo 4 pushed a car a thousand pounds bigger than the MGB and I think the B is going to be a winner with the engine....I have given passing considerationj to using the second 2.3 engine I own in the Z.......But, I can't bring myself to put the 4 Cyl in the car, even though I can easily get over 300 hp out of it, VERY EASILY. So, I continue to think about the Mustang V6. I know.......I really do konw that I could stay Nissan. Something is keeping me from doing it. Oh, I've searched and searched to find a way to post pictures...I THINK I have figured out how to do it. So, if so, here are three pictures of my Blue Z and as a bonus, an underhood shot of the Turbo 2.3 in my MGB