Those fiber gears dont hold up very well compared to the alum ones which will go on just forever nearly. Fiber gears were in there for the same reason the hyd lifters were-for quietness. Pickup motors never had them-the same reasoning is carried over into the 194/292 series motors,fiber for quietness in the pass cars and aluminum for durability in the trucks. Lubrication was not the problem, it was age.
