1979 Allison SS20 for sale. Core is bad. There were blisters in the gelcoat where the trailer bunks were. I have mostly ground them off and new gelcoat will need to be put back on. There are a couple of small holes in the hull where I ground some cracks out only to find there was no core behind the glass and a hole where the hull delaminated from a blister tearing off. The pad is warped. There are some stress cracks on the corner of the transom and and seating area. Transom seems pretty strong but is reading around 28% moisture around the bolt holes. Interior has some marks on it and will need to be painted at least. Boat is located in Granger, Iowa. $1000 obo. Call or text 515-829-79one4 for pictures or questions.