I recently purchased a 1971 144, B20A (see pic). I haven’t owned an old Volvo for 15 years: in the 90’s I had a rusty ’72 145. Like my old 145, the new purchase has some rust around the windscreen -- which seems to be common in 140 and 160s. I presume that the rust was caused by water ingress around the aluminum seal, and I plan to seal it up using silicone after the rust is dealt with. Is this a bad idea? -- should I leave this job to a professional windshield fitter?

The car runs very well, has good compression in all cylinders, but the dominant noise above 55mph is valve clatter. I might look at the magical oil additive potions next time I go to the auto parts store...