Tr-4 bonnet/tr250

[ag820@rgfn.epcc.Edu (Jim A. Mulligan III)]

my question:should a bonnet from a tr250 fit on a Tr-4 body?
what are the differences ? I hear the bubble for air cleaner clearance
has changed in length over the different trs but what about length of
and width of the bonnet 
thanks ,
 Jim
 

1959 AH Sprite MKI
1962 AH BT7
1963 TR-4

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