Hi there,
Just got my 86 s10 Blazer 4x4 auto, 167k with a 2.5 tbi Iron Duke. Shakes and vibrates like crazy. I'm told this is pretty normal for this motor, but still...!! Runs pretty well so far, could use a tune up I'm sure. Pretty basic otherwise, no aircon, no power steering. Radio plays static; frequency display doesn't illuminate. Also, no Service Engine light with switch on, even when jumping leads 1 and 2. So lots to sort out. Glad you're here to help!