2282 - Auto Meter Extension Adapter & Fitting will also work.. Goes inline with the upper rad hose.

This guy

http://www.stangnet.com/mustang-foru...n-answers.html

says to use

http://www.summitracing.com/parts/ATM-2275/

Anyone tried this? That adapter is pretty cheap, so I think I might try it if nobody responds here in a few days.

Edit: Here is their whole list of adapters, anyone know exactly which one to use?

http://www.autometer.com/cat_accessorieslist.aspx?pid=9

That's what I did. Also drilled and tapped it for a place to run my steam vent. I liked the idea of not drilling the water pump (in case mine was or went bad) and the two different sizes of rad hose it would accommodate if necessary.

Do you have a link to this? I can't find a damn thing in their online catalog.
1 1/4" correct?

Off the top of my head I'm not sure to be honest.

http://www.discounthydraulichose.com...ale_p/9235.htm

Here ya go try this one you prolly need the m12x1.5-3/8 nptf.

Anticarb, that is perfect. I ordered two. Thanks much for the link!

Mechanical Water Temp
 

The one that you are thinking of purchasing, I dont think that will work for the sending unit of a mechanical water gauge, it appears to be an adaptor that is for a electrical sending unit style gauge, Autometer sells one just like it. The one that was reccommended earlier by another poster that is made by Street & Performance will work for a mechanical and it is a
12mm X 1/8,1/4,3/8 or1/2 depending on the size of your sending unit, the mechanical ones are usually 1/2" and it is deep enough for the sending unit to fit inside, I have included a link to their website you have to go to their online catalog page 88 and it shows them, they are $18.49 Good Luck
http://www.hotrodlane.cc/08%20catalo...talogMAIN.html

lizeec, i really really dislike their online catalog. Thank you for finding that. Just to clarify, this is the one you're talking about, correct?

http://img84.imageshack.us/img84/9307/12mmadapter.jpg

Andy do you know what size the coolant probe is.

Not positive, but pretty sure it's 3/8 or 1/2. I will make sure tonight after work and post up in the morning.

I am on a very tight budget and had an old-school mechanical water temp gauge. I decided to use it, but it barely fit the 12 mm hole in the cylinder head where the factory one was. Any adapter would have put it out of the head.

I have a piece of galvanized steel pipe used to couple my two sections of upper hose, so I welded a nut on there, drilled a hole, and now have a "T".

It measures the temp of the water going to the radiator, not the block temp. Also, if by chance the thermostat sticks closed I will not know by the gauge.

Also, IMHO
I can't figure out which is worse, S & P's online catalog or the paper one I just got.

I used the S&P adapter on my swap. On another note, you would think with how high S&P's prices are, their website would be more user friendly, but calling them always works out best for me, and I really love the fact that they still ship C.O.D.

Correct
 

Yes that is the one I used the 12mm x 1/2 and yes their website and catalog aren't the greatest but if you call Mark Campbell ( the owner) usually answers and he is very patient and very knowledgable, they are quite expensive on most of their stuff but they are probably one of the first pioneers on LS swaps and their website has step by step information on many different vehicle swaps with many different engine and transmission combinations. Be careful when you tighten it down as it just seals with a copper crush washer I broke mine off in the head and had to use a EZ out to get the broken part out. I called them and they sent me out another one within 4 days and I was a little more cautious and it works fine. Some people don't like this adaptor as it sits about 1.5-2.0 inches out of the head due to the sending unit size if a mechanical gauge, I have verified water temps from my autometer gauge and also from HP Tuners and it was within 1-3 degrees so I was satisfied, good luck

Here is the kit I've got

http://autometer.com/cat_gaugedetail...gid=3353&sid=1

I'm about 99% sure it's 3/8.

That say the kit comes with 1/4" npt adaptor then you could get the m12x1.5 - 1/4"npt for the $7

Here's what I've got

https://lh6.googleusercontent.com/_v...0/IMAG0052.jpg

The two adapters on the left will fit on the sender, the one on the right is for the oil pressure. Problem is, none of these are 12mm for the engine block.

The fitting in the middle appears to be 1/4" npt that's the one I would use. You will still need to order the other fitting I was talkin about the m12x1.5-1/4"npt. Have you figured out your oil pressure fittings yet.

I just tapped and threaded the water pump, above where the coolant is hot going out to the heater core. Works like a champ.