Well, after searching for a while I finally picked up a '73 240. The body is about as unmolsted as I have seen-the sound of metal everywhere you tap, and the interior is in great shape. Even the friggin clock works. It has a N42 block w/N47 head but the original 4 speed. I have short term plans to dial it in, and then long term plans for mild building. So here are my questions:

1) Tach is off-it shows much higher than actual rpms. Can I remove the tach from the rear or does the dash have to come off?

2) Any trick to bleeding the brakes, or can I just drain the lines?

3) (Longer term) Can I just put a P79 on the existing block with flat top pistons, or is the the F54 block significantly different?

Thanks for any input.

Welcome!

I will answer the questions that I can:

1. The tach reading high is pretty typical, particularly if the ignition has been upgraded.

2. Bleeding the brakes is just like any other older car.

3. I have no idea, but I am sure someone else around here does.

1) It comes out through the front of the dash. One screw in the top of the bezel, and one underneath and maybe 6 or 7 inches farther towards the front of the car.

4) You definitely should invest in a Nissan factory service manual. You can find one on Amazon or Ebay -- both used, of course.

Thanks. Is the Nissan manual better than a Haynes book?

Also, after closer inspection, the block IS a F54, with a N47 head. Based upon what I've read, I'm not sure how that works without super high compression unless the pistons have been swapped for dished. I know the compression is not that high based upon the way it drove home.

The car has a stock exhaust mani and a dinky (appx 1.5") pipe to the rear.

Glad to have a Z finally.