Rusty,

Yup you should be able to bolt it right up, I'm assuming your using round top Su's. You supposedly get 5 hp with a 260Z manifold, I think its a little less, but Scott at Ztherapy says you won't really notice the difference on his video.
Great video to get!

zya
Yuichi
ZDriver.com

 

hey rusty
as for the power, norm the 12sec su dude runs the n36 intake manifold. he said it was known to produce as much as 10 hp. i say its worth the time. also, its better to put the thicker spacer pad. the thin pads gave less power for some reason. you would also have to change the intake bolts to the longer ones to compensates for the thicker pads. zya

datto

 

Rusty,

I would recommend you to bryan little's site, it has all L28 combinations and such, but unfortunately its down, I believe it resets every month and after its gotten so many hits they shut it down for some reason.

If you are going with a normal L28 flat top pistons, I recommend you go for N42, or if not that E31, the P90 will not give you enough compression unless your building a 3.1L I believe. The reason why the E31 is a popular head for some people is because they are involved in racing and can only use stock components meaning if you race a 240Z in a stock class rules its fine to use it, but can't use a N42.

So I'd go for a N42 if you can

zya
Yuichi
Zdriver.com

p.s. there is a computer engine program out there for L series engine's that gives you compression ratios to different combinations of heads blocks, pistons gaskets etc.. if your want me to look for it for you let me know

 

Sure thing Rusty, ok I found the link to the engine program

http://www.zcarclub.com.au (then click on tech section and you should see it

hope that helps!
zya
Yuichi
ZDriver.com

 

hmmmmm i have some flat tops in my shed with an intake with it... ill have to check it out!!!