what is the best head combination to run on a stock L28 with 72 Su's?

is the N47 going to give me better emissions due to the exhaust liners or would the E88 be a better combination?

Personally I think I would go for the N-42. E-88 has smaller valves than the N-42 and N-47. I've heard stories about the heads with the exhaust liners deteriorating over time. Just a thought you might want to research before you buy anything. You will probably find the N-42 much easier to find than the N-47 as I believe the N-42 was used for a longer period of time.

Look on the Datsun Garage web-site for a good explanation of the pro's and con's for each particular head.

I agree as I have heard the same sort of feedback. I have all three head models as well as a host of Z parts (i have owned 5 and raped many more from the salvage yards)

so I'm looking for the best combinations for building my 260. I have the stock L26, but not the rear and trans so the dream of a numbers matching car for my tastes is shattered right now.

Here's what I have so far:

1" lowered Tokico struts and springs

1" sway bar up front

7/8" in rear

All urethane bushings

New fenders

Cross drilled rotors

4 piston calipors

72 Su's

L28 from 78 2+2, L28 from 76 coupe or L26

E88, N42, and N47 heads

New floors

4 core rad

all new brake lines

R180 and R200 rears

76 and 77 4 speeds, 78 2+2 5 speed

So I am really looking to bolt together the best powerplant and driveline combination I can come up keeping the car relatively stock Z