[Healeys] scuttle top to shroud gasket?

[Michael J Maloney]

Listers;
Now that I have installed my shroud!  Help!
Those who need heaters and defrosters will understand my query.
Should I have put some sort of gasket/caulking between the shroud and
scuttle to direct the most air to the windscreen, before I go any further?
Next,is the shroud fixed to the scuttle at rear of bonnet with 5 screws or
pop rivets?
Thanx to all,in advance, Mike Maloney 66 HLY