[Roush #1]

Kevin,

Yes, I use that thermostat housing.

It took about 2 hours in all to stop the leaks.

My housing leaked until I machined enough of the housing away to get at least thirty thousandths of an inch of compression on the O rings.

If you go ahead and machine the housing before you start you wil save a lot of time.

I installed, removed and modified the housing 3 times before I stopped the leaks.

I think you would be wise to replace the O ring if you remove the housing.
They are cheap and readily available.

Hope this helps.

Good lluck!

J