Here is a decent site. My boss is using the altronics red alert system w/ 8 probes on his 1500hp 70' vette . Its not listed on this site but they do have some dual egt guages

http://www.biondoracing.com/DataRecorders.shtml

'99 Silver svt For sale 19" Axis Neo wheels 3.0 parts, pre-98 trunk, Check classifieds bp.powell@comcast.net