Hot Rods Help! What size pleats for a '60's interior?

I need help getting the right size pleats made for my interior. I'm building a '55 Chevy Gasser with a late '60's theme. Interior will be black vinyl pleats so I need to figure out what size should the pleats be? Anybody know?

 

I did a lot of 2" back in the day

 

Some 1'' ,11/2, 2''.2 was probably the most chosen.If doing back sewn, each line takes about 1/2'' extra material which really adds up.My Lincoln is 2''. Jack

 

1.5" to 2.5"...depending on thickness and density of pleating foam used.
Keep in mind that the thicker/denser the foam, the more it will shrink the width of pleats after its sewn.
A common rule of thumb is to add half the thickness of the foam for each pleat sewn.
For example if you want 2" pleats and your using 3/4" foam add 3/8"...draw your pleats out at 2 3/8".
This applies to simple top stitch pleats, tuck and roll pleating as well, but the layout and sewing process is somewhat more involved.

*Thickness/density will dictate how defined the pleat will stand out.
*Also make sure your pleating foam has a backing such as muslin, this prevents the stitching from pulling or cutting through.

 

A finished product with a 2" pleat will look great!

 

http://upholsteryjournalmag.com/articles/0212_ht_tuck_roll.html

 

Weren't they onto Diamond Pleat etc by then?

Or Rectangular Pleat with metal 'breather rings' like GT40 etc?

 

I used a 2 1/2" pleat