Hot Rods Banjo Axle Housing Diameter 3"?

I'm looking to order some Industrial Chassis '36 rear bone mounts. Just wanted to verify that banjo axle housings are 3"(?) before I order the wrong size. I'd go out and measure but I'm hotrodding from work today. Thanks.

 

Banjo housings taper. Here are the approximate dimensions in inches from big end to small end.
1933-4 3.64-2.34
1935-6 3.68-2.375
1937-41 4.16-2.9
1942-48 4.2-2.9

 

Thank you for the info.