Carmak

I just bought a 69 302 Mustang. It was restored in the 90's and has been in dry storage the last 5+ year completely unused. The brakes are very grabby. I have had cars before with leaky wheel cylinders and they are grabby also but after a couple hard stops (and some heat) they grab less. This feels different. This is my first Mustang (first Ford other than early 60's T-birds years ago). Is this a chronic thing? Thanks. Carmak Riverside, Iowa