where do i look for the infamous matching numbers on my 73 240z

Engine Num on block=Engine Num on VIN plate

is that all. i mean what about the tranny? any thing else

is it on the right

side right above the starter

ahhh gawd. I'm having a seniors moment and can't remember which side it's on!

The VIN plate on the right front strut tower will have the engine number. The engine is stamped on that same side at the very top of the block above the starter. Just below the head, on the top face of the block. That's it. The VIN is stamped in the firewall, appears on the dash and the driver's door jamb which also includes the manufacture date. Various parts are dated and there is a seriously fun anal conversation in the archives about it.

Sorry About No Research I Looked At My #s And Of Coarse They Dont Match I Guess It Is Time For V-8

082194 Are The Numbers On The Block. Hls30-171743 Are On The Vin. I Wil Research. The Guy I Bought It From Was Kinda Shady. Dont Get Me Wrong It Is A Good Car But I Thoought It Was Original. Guess Not Right. So Where Do I Go From Here. Jtr.

Maybe I Should Forget The Past And Move On To More Cubic Inches

082194 Are The Numbers On The Block. Hls30-171743 Are On The Vin. I Wil Research. The Guy I Bought It From Was Kinda Shady. Dont Get Me Wrong It Is A Good Car But I Thoought It Was Original. Guess Not Right. So Where Do I Go From Here. Jtr.

Maybe I Should Forget The Past And Move On To More Cubic Inches

Let's not get ourselves confused.. the VIN won't match the engine number.

The original engine serial number is stamped - not on the VIN Plate - but rather on a Data Plate under the hood (as Chris mentions above) - it's a shiny metal plate about 2"x 4" and the original engine serial number will start with "L24-"......

Your 73 240-Z would have a Date Of Manufacture (aka build date) of 07 or 08 of 1973. That information is stamped on another Data Plate that is affixed to the Drivers Door Jam.

Now - go look more closely at the engine number stamped on the block... On the block there are two flat pad's cast into the block - the first one should be stamped "L24" Is it?

The second one might be

182194 rather than the 082194 you reported...

If the serial number stamped into the block is actually 182194 .. it might be the same number as is stamped into that Data Tag under the hood.. As that is in the range of the engine serial number sequence used in 07/08 of 1973...

If the engine is actually stamped with L24 082194 it is most likely out of a Z built O2/03 of 1972.

What is the serial number stamped into the Data Tag on your Z?

FWIW,

Carl

The engine info plate is here:

Virto, that's a 280Z and you're showing the left front strut tower. I believe that it would be on the right front strut tower on a 240Z as Chris stated.

Virto, that's a 280Z and you're showing the left front strut tower. I believe that it would be on the right front strut tower on a 240Z as Chris stated.

Crap. Just when I think I know what I'm talking about.

Well...take that picture and mirror it in photoshop, you'll get the idea....