C.,
This may help.
220 is chassis 187.011 -'51-54 w/eng 180.920

220a is 180.010- '54-56 w/eng 180.921'

So.....

SB's 219 is a 105.010 with a 180.921 eng. [ 55-59 vintage]
That is the same eng as the 220a used, so check your chassis
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