Six pack response...

I would recommend replacing the diaphragms if they are old, they get stiff and don't open properly, you will notice the difference when they are new. then you can start tuning the vacuum circuit if you want.
I had the six pack rebuilt last summer but now that I'm thinking about itxi don't know is those were changed.. I'm going to look into that as well.
I know that you are well versed with these carbs, (i've pm'ed you about nitrous if you recall) so I want to ask you also if and when the diaphgrams are replaced do you have any suggestions about spring color swaps, etc for stiffness ?
Thanks.
MAPS