Zerex makes some pretty good stuff that's sold at AutoZone. Just pour, run, then flush. If you don't have a flush kit installed then pick one up. They work great! As for the coolant I'm running Prestone's Extended Life. It's Dexcool basically. I've also found that adding a little Water Wetter by Redline noticeably lowers my operating temp. It works best with a low coolant/water ratio so I run only about 15% Dexcool in the summer, distilled water, and a bottle of Water Wetter. Works great down here in San Antonio.
John
[color:blue]'68 Coupe
250/C4, 221 Argentine Head</font color=blue>
John
[color:blue]'68 Coupe
250/C4, 221 Argentine Head</font color=blue>