Cliff,
There ia a "thread-sert" device available.  It includes a tap for 
threading a drilled out manifold threaded boss, installing the provided 
"thread-sert" that matches the correct sender.  I was not aware of this 
before I heliarc welded the existing boss closed, and redrilled/tapped 
for original thread.
Sounds like the threadsert method would be easier for those without 
heliarc aluminum welding equipment.
This can, however, be farmed out.  So can the threadsert conversion.
___
Steve Laifman
Editor - TigersUnited.com
Cliff Alexander wrote:
>I'm putting a crate motor in my Tiger and I'm going to use a Edelbrock intake 
>manifold. My question is, how do you attach the water temp sending unit? I 
>think the sending unit has 5/8" x 18 threads and the manifold has 1/2" NPT, 
>close but not close enough. The PO had changed the original manifold to an 
>Edelbrock and it looks like he used an epoxy of some sort to seal it in. 
>Thanks in advance for any ideas.
>    Cliff
 
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