JC Whitney has some stuff that is similar to dynamat and is about half the
cost. You might want to check that out. My dad used it on his 55 Ford
F100. It works very well. I've also heard some people have used the Line X
or Rino Lining on the inside and/or outside of the truck and it is suppose
to be just as good or better.
1953 GMC Panel truck (Rod Project)
oletrucks is devoted to Chevy and GM trucks built between 1941 and 1959