u67 head

[Farmer Joe]

i was lookin at the engine in the truck and the head on the l20b block is a u67 head? is that stock for the l20?

 

what did the u67 head come off of?

 

thanks

[Pacific coast Datsun]

http://www.the620.com then go to tech. section. Its all broken down there.

[datsunaholic]

The U67 was the stock head for L20Bs in '75-77.

[Farmer Joe]

The U67 was the stock head for L20Bs in '75-77.

 

mkay! good to know. thanks!!

[blueridgespeed]

The U67 is also (one of) the preferrd heads for doing an L-Z 2.2 type Frankenstein engine. If you want to do Nissan pistons, the KA24E (single cam, stock piston diameter 89mm) are still available, and you can bore a z22 block, use the crank from that block, and with the U67 head you still have a pump-gas amenable compression ratio. (Z22E or Z22s pistons were NLA a few years ago when I was doing a rebuild)

 

I had a setup like this in my last 510, with Mikuni 44's and a custom cam from Malvern racing and I loved it.

 

The U67 is a 'open chambered' head. The closed chambered heads have their advantages as well - more detonation resistant, etc. It's all on the links above.

[Farmer Joe]

okay, bringin back an old post.

 

is the u67 a square port or round port head?

[240ADAM]

Its square port.

[Farmer Joe]

mkay cool deal.

 

gotta exchange my gasket then. damn NAPA...