Headlight surrounds - #8 x 3/4" (generally same as Wingtop Vents)
Interior dash has LOTS going on...which specifically are you talking about? There are some #8 x 5/8" screws (Lower Dash, Instrument Panel, Door Panels). Check strap covers are #8 x 3/4" ...Demisters I prefer to use a #8 x 3/4" actually as it fills the "hole" in the demister better, but *technically* it's a #6 x 3/4" screw if I recall.
I'll leave you with this self-serving link if you don't want to "recreate the wheel" on the interior
bits & pieces:
Also have exterior
kits for 110s available as well.