mtlman8 said:
it looks like those are 175 cd's. not cd 2's if they are than they are adjustable.
Just for clarity, I'll point out that there is only one main adjustment, which changes the mixture equally throughout the range. In fact it's somewhat dangerous on a modified engine, because you set the adjustment at idle, but it also affects the mixture at cruise. If your exhaust changes reduce backpressure at cruise, the mixture will probably go lean there even though it is adjusted to be correct at idle.
I believe this is a common cause of failure with tubular headers.