Re: Canadian Flathead?
'Does a Canadian 1938 81 221 have 2.399 " main'
No, the 81 blox run the long snout, big main journal cranks.
The 24 stud, 221 blocks that run the short snout, late 36-37 style crank with the flanged rod bearings, do not have 81 cast on them anywhere.
C7RA heads are late '40's offerings from Canada, standard equipment on C69A blocks. Available in cast iron and aluminum versions
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