Suggestion regarding this situation was posted long ago in this thread.

I think that I would grit my teeth and try to drill it to the correct diameter (or, pay a machine shop to do).

That is, however, assuming that JC's hole-size is wrong (it is not listed, as I recall, but I forget the hole diameter and your needed diameter)?
I'd buy his blade, if it works; or, drill your blade if JC's will not work for you.

http://www.oldchevytrucks.com/cart/product.asp?prodid=MEE243&i=19667|||||

Last edited by tclederman; 02/22/2018 4:58 PM.
Tim
1954Advance-Design.com
1954 3106 Carryall Suburban
1954 3104 5-window pickup w/Hydra-Matic
The 216 and early 235 engines are not "splash oilers" -- this is a splash oiler.