[AT] DLTX Carburetors

[Dave Ernst]

What is the differences in later model cast carburetors?
For instance, on my JD model B the carb is junk, and labeled DLTX 67.  I 
bought a DLTX 71 at a swap meet yesterday and there is virtually no 
difference in the outward appearance.  Is it the size of the jetting?  That 
is the only thing that comes to mind.
The Turlok Ca swap meet was pretty good this year and saw a couple of list 
members there.
Thanks in advance,

Dave