Hi everybody, im a new z owner and this is my first car. I got a few questions since i got my z in pieces. Im a owner of a 1974 260z and I believe i own a l26 as well. I have a e88 head, p30 block.With a 5spd tranny and im not sure thats the original engine and tranny. i also have dual su carbs, and since i dont know alot about carbs. the car is a mess. Here are some pics of my z:

sorry im still trying to figure out how to post up pictures

The engine number should be stamped on a flat area on the right hand side of the block near where the block and head meet. The engine number will also be stamped on an information plate in the engine compartment. On the 260Z I believe this will be on the left hand side somewhere near the washer fluid resevoir. If these number match yo uhave the original engine. The 240Z and 260Z came with either a factory 4 spd or an automatic so the 5 spd is almost certainly not original to your vehicle.

Yes i know that, but what im trying to say is that if the e88 head and the p30 block is stock or has it been swaped

you guys can access my photos in my z photos

From what I see in the pictures, the car is an early '74 260Z. Five speed transmissions were not offered in the US until 1977, so that is definitely not original. There were at least four different versions of E88 head castings, fitted from late '71 through the end of the US 260Z run. So the head may be original, but may not. The P30 casting on the block tells us very little, you'll need to compare the engine serial number to the ID plate on the passenger inner fender (assuming the plate still exists). The carbs are from a '72 240Z, which is a good thing. (The original 260Z carbs are not liked by most people.)

it doesnt have the id plate. but thank you that really help.

And also have another question my crankshaft pulley is loose and as you can see in one of the photos. i was wondering why is loose is there suppose to be something located arounnd it or underneath it?