I may well be wrong, but my understanding is that any of the blocks that were made with 3+3/16" bore, will work. The 3+1/16" blocks can only go out to 3+3/16"
If I have this wrong please someone let me know.
If you think about it
Std bore =3.1875
+.060" over bore (normal)= 3.2475 (2 1/2 thou under 3 1/4")
Add to that another ).0625" (1/16th")(or another 0.031 thou from each side) and you are there.
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Bluebell
Carrier Armoured O.P. No1 Mk3 W. T84991
Carrier Bren No2.Mk.I. NewZealand Railways. NZR.6.
Dodge WC55. 37mm Gun Motor Carriage M6
Jeep Mb #135668
So many questions....
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