I knew someone had posted some good info before on gauges and, sure enough, I found Jeff's post <a target="_blank" href=http://coloradok5.com/forums/showflat.php?Cat=&Board=blazer4x4&Number=230920&page=&view=&sb=&o=&part=1&vc=1>here</a> Looks like most everyone went with (suggested) AutoMeter Sport Comp mechanical gauges. However, Jeff went with VDO and seems happy with them. Normally I agree with the mechanical too. I ran mechanicals in my 66 GTO and in my 72 L82 (damn capillary busted and oiled down my new carpet in the Vet). My question is about using mechanical gauges with ECM/EFI. Looks like the ECM needs to know about oil pressure and engine temp so, unless I miss my guess, I'm stuck with electrical OR dual electrical/mechanical sending units (and trying to find a place for the mechanical sending units). Unless someone corrects my thinking, I guess I'll just go with electrical... Russ 85 K30 CUCV, 350 TBI, TH400, 205, D60/C14, 4.56 Locked Some day: 4" lift, 44" tires, massive cutting, shorter wb and rear overhang.