I was looking for a new U67 head to build up for my LZ 2.2. Someone is trying to sell me a 210 saying there is little difference. I have read that the U67 is THE head for this conversion. Can anyone clarify? What are the differences between the two? and assuming I will be adding new valves, cam, etc. Which would be better?

Thanks.

A 210 head has tiny intake ports and small valves, which are too small for the L16 it came on, will utterly STRANGLE a L20B, and would be horrendous on a LZ22.  Sure, they can be ported and have the valves redone, but if it hasn't had any of that it isn't worth anything.

But a U67 isn't the only choice- an A87 will work as well (most US-spec ones have open chambers but there's a lot of closed chamber ones.  The open chamber ones cost less).  Or a U60, which are a bit hard to find but pretty much the same as a U67.

Hey CDOGG, thanks for the reply. What kind of HP are you pulling on your Z22? Someone left a post on another thread about using the Z car valves and such, and maybe a DAMB cam? Spray bar? what ru  doing? and buy the way, the link you left me was empty, what was it?

Chris, what do you know about the 38/38? I assume it would be something like running 38mm su's? I want something that would feed the high end more than the bottom, but I'm only sportin' a JAp spec L18. Any Idears?

what do you mean by upgrade? I ran a 32 36 before, and I liked it, but I want to try something diff. My choices are a su carb setup with 44 z carbs, or a 38 38 on an L16 manny, w/ the high rise adaptor. I'm after higher end horsepower, not so much low end. But I have to be able to drive it everyday, too. I was just curious about what the 38 38 has to offer over th32 36, know what I mean?

No, dude, I have a japanese L18 with an A87 peanut chamber head, it's been dropped into a 1977 620 shortbed/shortcab. I know the 38/38 is bigger than the 32/36, but I haven't heard of anyone actually using it, yet. I just want to try something different than a 32/36, besides, I'm aiming for high end horsepower. Again, my truck is a sand toy/ daily driver.

I think you will want to run dual sidedrafts to get 150hp out of that motor.
The 38/38 carb isnt all that much bigger than a 32/36 DGV
I tryed to buy a LZ22 hybrid from this guy named chris and I didnt think it was that muchbetter than my L-18 in my yellow 510 and it has 40mm Mikunis on there.
The trick on the 38/38 is the manifold. Alot of people use the stock one which kindof chocks it down plus the air has to go in a 90deg bend. losing some vol.
But I like to hear about your conclusions. I will think you will go to a sidedraft set up.
But I friend in Austrailia was running 2 webers. But he really had to rev it up. I told him to lower the gear ratio.
Later he went to a 38/38 and it was more streetable. But I think he lossed some HP. But he has a intake that was for that carb which had the big bottom on there were the gas was mixing. This was a 2000cc Pinto motor in a Ford Cortina 1969.

I do have a U67 head with the 280z valves ported and polished in my spare room. I paid 250$ for it I dont think Im going to use it It even has a cam in it. Be honest it looks almost to big. The only thing I dont like about it it has the rockers reground. I dont know if I would run reground Rockers.