1972 Drip Rail Foams, do I need both?

[CDN72SE]

Ordered the drip rail from Megaparts, way of DMT. It's for both E & B-body.

This kit consists of 4 rolls of material for each side of the car
- (2) rolls of 1/8"x7/8" black poly foam to seal between the weatherstrip channel and the roof,
- (2) rolls of 1/8"x3/4" dark gray soft foam with adhesive to seal the weatherstrip channel to the drip rail.

I don't think I need the two rolls of foam, I only remember seeing the adhesive strip, any ideas? Thanks.