Rear shock and tail to make sir seat

[garyS-NJ]

I have a nice air seat in my dump truck and was thinking would be so nice to have an sir seat in my friends boat for those long hard offshore rides. But truck seats are expensive. Junk ventures and parts like a tail section might not be too expensive and I bet could make a nice air seat.. but perhaps to stiff for just a man on a seat. Comments? Maybe a lighter sprinng??

[garyS-NJ]

I'm going to buy a used truck air seat.. posted this before I found them around $150..