392 spark arrestor

["Chris and Ranae Procyk" <procyk19@domain.elided>]

I swear I only have one spark arrestor on each of my 3 392s-- but I'll
verify that when I leave for work.  One is ImpCool, the others are regular.

In Use: 70 1210 4x4 TE, 73 1210 WM
Project (2nd time) 67 1000B PU
Parts: 67 1000B TA   68 1100 4x4 TA  72 1010 TA