Thanks. I haven't seen the seam sealer before. Was that how the factory put them on? I don't think I'll use seam seal but I might cut some gaskets from thin rubber or some other material.

Any idea on which fasteners to use? The scoop I bought has fairly small holes in it for the bolts. I assumed the factory would use a 1/4-20 bolt with a captured washer but the scoop I bought looks like it needs 10-24 bolts. I doubt the factory used 10-24 but maybe they did? Just seems small for what the engineers were doing in 1965.