I picked up a 6 into 1 ceramic coated header from MSA along with their stud kit and washers. The kit includes 10 short and 6 long studs but no instructions on which ones go where. I am sure the longer ones go where the intake sits on top of the header flange and where do the washers go. My '72 240z has had a L28 long block swapped in to it and several of the bolts holding everything together was mix and matched. Does anyone have a diagram on which ones go where?

Checked the microfilm, it didn't help and my head in the garage doesn't have any studs in it... D'oh...

Here's something that may help. http://www.classiczcars.com/forums/showthread.php?42420-77-280z-head-removal-step-by-step-photos

Lots of pictures. I'm sure the Factory Service Manual for '75 thru '78 would have a diagram. Here's the one for the '78.

http://www.jdmgallery.com/information/s30-manuals/s30/

The short ones go in the top of the intake manifold, above the intake ports on the head - 6 of them

FWIW,

Carl B.

Hey guys, apologies for not posting back sooner. Work has been super busy. Carl, are you saying I should have 6 short studs and 10 long studs? If so I have exactly the opposite. Your post made me go double check what MSA sent me and I have included the pic below. I actually have 17, 10 short, 6 long, and 1 that is kind of in between. Any other thoughts or ideas?

Hi Hardway:

- OK - what is short, or what is long -the length of the studs or the length of the sleeves on the studs??

In your picture the "sleeves" on the replacement studs are longer or shorter. The actual length of the studs look about the same.

In that case, I'm pretty sure the six with longer sleeves go though the top of the intake manifold. I'll look to see if I have some original OEM type to compare. The newer replacement part are not exactly the same... but should work fine.

The one that is between sizes - is the one on the rear of the exhaust manifold - where the engine sling bracket goes.

The last ten go everywhere else.

As I recall - The shorter end of the studs screws into the head everywhere.

Be sure to get nuts/washers on all the studs, while everything is loosely fit - before you start to tighten them down. If the actual threaded ends of a couple of them are longer than the original OEM studs - they might be sticking out too far with the manifolds pushed up against the head tight. This is especially true with some headers and/or Cannon manifolds for triple carbs.

Tighten them down evenly from the center working toward both ends equally.

I'd use some locktite on them. It will help prevent them from welding themselves to the aluminum head - and help prevent them from backing out when you try to take any of the nuts off them in the future.

FWIW,

Carl B.

Edited April 30, 201212 yr by Carl Beck

A pic here might help.

Looks like six short on top.

On bottom looks like L S L L S S L L S L

http://sites.google.com/site/zlalomz/gtureplica

Edited May 1, 201212 yr by black gold man