[TOMTOM]

how do I know what head is on my 74 260 Z? I know there are diffrent ones. is there a csting number on the head? I ask becays at the junk yard I work at we have abou 5-6 L28E motors on the ground and I was wondering if and of thier heads would flow better than my stock one. and what heads are better than others.

 

[My280ZxIS KILLINGME]

The casting mark should be below the #2 spark plug

 

[TOMTOM]

is there one I should keep an eye out for? I hear P90 alot, I also have read N47 alot.

What would be the best (HP) for a N/A carbed 4 speed 260?

 

[My280ZxIS KILLINGME]

Can't help out about which one to use, I'm insearch of some of the same answers I'll keep you posted if I find out though.
-J-

 

[Tony D]

I have N47...

I'm told my compression is higher than most (186 on all six). It has the larger valves of the L28, and I would suppose a small combustion chamber.
It easily pulls to 7000. There is not the fall-off like in some other cars I've driven. It seems to actually like the higher revs, but I shift at 7000 because I like to keep my pistons...