We used modify forms and changed the spot where the date came in to a straight text line of "Quotation is valid for 30 days.  
 
Then we created a dummy quote #1 in SO-P-A.  We have a lot of information we typed in the Quote Notes.  I think we also modified the font so we could fit more.  
 
But it helped standardize our quote information.  It shows information such as:
 
Parts supplied:  Forged, trimmed, and cleaned.
Material grade: ______(whatever it is)____
 
Die design & development: 50% due with order, etc, etc, etc,
 
I include the estimated delivery also.  
This works really well for us and you can modify the quotation notes as needed.

Yes, that is what we do in the quote notes:
 
Estimated delivery: 6-8 weeks after receipt of order  
 
And if upfront money is required then we just add on that stipulation also-the clock starts ticking when receive BOTH the order and the money.