Driveline vibration
 

My '66 K-Code has developed a nasty driveline vibration. I'm thinking it's a faulty clutch but what does everyone else think? It only vibrates when releasing the clutch, esp. in 1st, and shakes the heck out of the whole car. All driveline mounts are tight.

In addition, can anyone recommend a good clutch? This is a street and some strip car so I'm not looking for a drag clutch but something w/ good performance and not too heavy of a pedal feel.

I have had good luck with Zoom clutches, work good and not to pricey! As in every clutch change replace the throwout bearing as well.
This vibration can also be caused by u-joints or driveshaft balance problems. Take a good look at these parts as well.

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69 351W Sportsroof deluxe