I would like to know if anyone could direct me to a website that shows detailed photos of the M-41a1 "Walker bulldog"?

Tanx Heaven has 4 different detailed walk-arounds. Scroll down to the M-41 section in the list.

As a side note, you have this listed under the Allied WWII subgroup. The M41 was a post WWII, late '50s tank. It did not see combat service till Vietnam when it was used by the ARVN (S. Vietnamese). It has never been used in combat by US troops. More info on can be found on the M41 at Global Security.