You mean hard seats? They can go out but the chances are slim, Its the gas we have to use is the problem, Some gas is very dry(no lead) and that's where the problem begins,And all the stovebolts back then were made out of good cast iron, not the crap we have today,Today is all about saving weight and thin castings.

http://s1055.photobucket.com/user/baldybenny/library/

1936 1.5 wrecker,1937 gmc coe,1939 Chevrolet coe,1942 4x4 coe, 1942 coe,1946 dump,1947 2 ton dump,another 1947 2 ton dump,1950 coe,1967 c30,1937 cat 22,1936 Chevrolet 5 window foremans coupe, 1914 ford speedster.