That certainly seems to be the case for the .56's and .72's, but I never saw a .40 in the Gold/Black box. The switchover appears to have been around 2001 - 2002.

As far as I know there is a definite diffrence between the 72's ,(compression) and none between the 40A's.  I happen to have a gold box high cam 72.

This is an interesting question.  The issue is not really one of "gold box" - "white box" as it is one of ascertaining the relative compression ratio of the various motors.  In a prior post, it was agreed upon and rightly so, that this can only be accurately ascertained with a simple compression test.

As to desirability, there is none!!! It is simply a matter of personal preference!!  My Saito 72 has been modified to give me an "old school" Supertigre 46 type of run which I like, (hey, I'm older LOL).  Whatever floats your boat. 

I do feel that if you are going to get serious about 4 bangers, especially the big ones, you should amassed enough experience to know what type type of run you like.  I strongly felt I needed to "bring down" my 72.  I feel the 40A is PERFECT for me out of the box.

My Saito 72 is the oldest "hot cam high compression model. That is the only model they made when the engine first came out. Hobbico sells a compression tester for $20.00  All of the next big block purchases will be tested to know just what the drop is and what I will do about it.  I am not aware of any changes to the 56 like the 72 but the 56 will be checked and probably modified.  I know how they run.

I don't see the point on the 40A in that I  1. Know that they didn't change them and 2. They have for me a "stunt run" out of the box. My 40A runs like Tim Meeks "high zoot" Moki 51.