Tom,
The housing originally had a lip. But to fix a clearance issue, I machined down the housing body about 3/4". Now, there is no lip.
The hose was not of the reinforced variety. It was a precut section that was the perfect size. Not being reinforced, it bulges slightly between two hose clamps.
As that bulging continues and the hose hot and cold soaks, I think it wriggles its way up the housing.
I'm going to make the change to the rolled aluminum 351 tank from cobraaccessories.com so that it's all hard parts and no hoses. I think I'll be safe then!
Thanks for the heads up, I suspect that you have hit my problem on the head.
