I picked mine up in Tucson Az and drove it back to Ga. Stock engine, SU's, no problems on the trip. It was the most enjoyable road trip I have had. Mileage was in the mid 20's. The only issue I had on the trip was trying to leave the gas stations, it seems everyone has a Z story to share. I was originally looking for a V8 car before finding this one. I had every intention of doing the conversion until about midway through the trip when I finally realized what Mr. K had given us. The Z is such a well balanced machine, sure I love HP as much as the next guy (510 with a Turbo Tom L28 was my last Datsun) but I am learning to appreciate what the Z isn't......it isn't heavy, overpowered, complicated and most importantly, it isn't for everyone. Yet it's funny how Z's seem to affect everyone......