[mitchntx]

Glenn has done tons of research on this and we are both about to the point of have custom machining done.

Autometer guages have a sending unit that is 1/8" NPT.
An LS1 motor has ports machined in, but are 12x1.5 metric.

Sure there are adaptors, but the wall is so thin the adaptors twist off with MINIMAL torque. And by that, not enough to crush a seal enough to prevent a leak.

Why don't they make a 12x1.5 sender?????

The stock sender ohms out WAY different ... almost 1K ohms lower than the AM.

[rmackintosh]

a M12x1.5 male metric adapter w/ a 1/8" NPT female has a .030" wall thickness. how tight do you think it needs to torqued till it fails?

....that answers THAT question.....

.....how can you judge a part that you haven't tried???? Reading a parts specs on a website, or catalog is no way to come to that conclusion......Autometer is a VERY GOOD company in my experience.....have had ZERO problems in two race cars (tons more if you count the ones I have worked on not just owned).....the little plastic tubing event aside....If they make the adaptor....probably thousands in use....my guess is it probably works.....

Not trying to be an A$$, but why not spend $5, get one and see for yourself if it works.....