Ideally with your SWG you do want your CYA around 70 or 80. And yes I agree, get some Muratic Acid to lower the PH and begin to lower the TA.
Also, I recommend you shock your pool with liquid chlorine, not your SWG, as that can shorten the life of the SWG Cell. Manually add liquid chlorine to raise your FC to shock level (use the Pool Calculator to figure out how much to add) and turn off the SWG while you shock. Use a good test kit to measure your FC levels.
You want the K-2006 by Taylor NOT the K-2005. The K-2006 includes the FAS-DPD test which is essential for pool maintenance, the 2005 doesn't have it. But IMHO you get more for your money from the TF-100, it has more reagents and a great price, plus excellent customer service from Dave. Check out the article in pool school that compares the two kits.