hey, gotta '94, 4.3 Vortec( Oh, BOY!)...current problem is, well, it's gettin' old...so, one fine freezing morning I give the handle on the rear door the hardy heave to overcome the frost...and bata Boom, bata Bing...I hear the internals hit the bottom of the door inside the panel...this was a LT......

So, low and behold, the fan stopped working...Ran a jumper to the fan, it fired right up...So, I figured, it's an '93, the switch died, got one from the local donor yard, it didn't help...Oops. So, I look for current behind the switch, it's live on every lead from the switch outbound...I got the fan...

Weelll, I used some 3" seamless "fart fan" duct work on my '92 Vortec, 4.3. It also comes in 4". it's corrugated and collapsed, so that you can stretch it out and bend it, w/out any kinks. Works really well. Then I insulated it with some aerocel, it's green foamy, kinda plastic &...

I was reading one of the topics last night, before my registration cleared, so, I couldn't comment then. Anyways, everyone was all over changing their plug wires. I checked a brand new set of XYZ bitchen' wires and my original stock GM's for ohms...the OE's, after 150K were still in near perfect sha...