Help Identifying Suspension Drop

[LSX_M3]

Hey Guys,

New to the forum and new to old chevy trucks... I picked up a 1968 C10 Long Bed about two months ago and started replacing all of the old stuff.

One thing I noticed when replacing the ball joints is, the springs are "bent" into the shape of the suspension travel, aka having a curve to them. I'd like to replace these with proper springs but I do not know what the drop height is and/or what springs it has. I did not have a lot of information on the truck when I bought it, as the fella I bought it off had it shipped up from his nephew in Kentucky.

Here are some pictures to hopefully help identify the suspension.

Suspension - https://photos.app.goo.gl/2D65G7HGS1D9apF79

Ride Height - https://photos.app.goo.gl/c5i4rai2Bk9wYkHt9

Truck is neat, overall fairly low rust, 400sbc, th400 trans.

If you cannot see the pictures, please let me know!

Thanks,

Bart