[Healeys] Dash Area Noise

[Roger Grace]

67 BJ8 
 Am about fit to be tied ! 
 Have been struggling with a new intermittant noise for about a month now. 
 Seems to eminate in the dash area above left side of glove box, 
 A creak rather than a clunk. 
 So what have I done. 
 Tightened everything in that area - starter mounts, clecked bell housing, checked brake booster mounts, jammed the air vents solid, removed center console and still no improvement.Tightened windshield side mounts doors checked. 
 Was convinced was something to do with the heater controls - spent most of one weekend removing and replacing it more securely (what a pia job !). 
 The noise is not tied to road or engine speed, but worse when going over uneven surface, even very slowly. Also thought was worse after car was warm so switched heater valve off. 
 Thought had breakthrough as got a lot better with top up that pointed to windshield mounts. But no after a few days back as before. Actually sounds like expansion type noise. 
 It even occasionally does one or 2 creaks when car stops. 
 In last 2 years had windshield replaced so wonder if could be a problem there ? 
 Cannot recreate the noise with all manner of pushing and pulling of dash or glovebox or airvents and windshield in that area. 
 Tried jacking the rear end up in case was chassis but no change, 
 What is maddening is that there are times when for aboiut 20 mins of driving it is gone.... 
 Ideas please ! 
 rg.
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