Vive la difference.....
....cause it is not significant.......
To the best of my knowledge, without spending hours in fridgid weather to measure the various frames I have....... there are no major differences in size width, lenght, etc......
However, the cab 11 and cab 12 are bolted on the frame or I should say through the frame...... therefore extra holes in the frame...... the cab 13 has those ugly massive cast support , L shaped on each side of the frame roughly above the frotn axle and the wussy leaf spring attachment as a 3rd point at the rear of the cab........ early cab 11 have smaller Delco front shocks usually found on VC Dodges..... and finally the engine cross member on early cab 11 only has one thckness of steel where it attaches to the side frame..... they usually cracked and the later cab 12 and all cab 13 had a second layor of steel shaped and rivited to the ends where they connected to the frame..... from my experince they also cracked but at the lower connecting point Which was not so visible and no see no fix..........
So either cabs can be used you might have to remove the 13 pads and leaf spring and drill a few holes predicated by the bolt pattern of the floor plates......oh yes.... you will have to fabricate some 3/4 x 2 inch hard wood spacers to fit between cab floor and frame.
Good luck and show us some pictures of before during and after....
Booob
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Bob Carriere....B.T.B
C15a Cab 11
Hammond, Ontario
Canada
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