Wanting to remove a wall between the 2 rooms, see picture
below.

Some say truss do not need load bearing wall, want to get
opinions on this. I have checked the wall and I can add a full LVL header back
in to set on jack studs on each end. Questions, can this wall be removed
without a header going in?

If Required - what would be the minimum size of a LVL
that I should install?

What are the qty. of jack studs on each end for this size
opening?

here are some facts of my project:

Here is some info, also see attached drawing:
1980 Build with truss rafters - 4 / 12 pitch roof.
Truss are 16 inch on center with 2 x 6 ceiling joist and 2 x 6 roof rafter.
These are true trusses, have verified.

Note - current opening in wall to be remove is 5 ft.

2 x 10 Floor joist 16 inch on center.
House width is 34 ft wide.

5/8 inch drywall on 8 ft high ceiling.

Poured wall basement with steel girder directly under
wall to be removed.
There is a second steel girder dividing the 20 ft family room span.
Wall location to be removed - 20 ft on family room side and 14 ft on living
room side. (A)