Re: '66 Malibu N/SA
 

Yes, mufflers still on. It was warm but not really hot. I'll be double-checking some things a little later today.

Re: '66 Malibu N/SA
 

I don't really see anything wrong with the driveshaft. It pulls back 1 1/16" from fully inserted into the trans. And it's a 3 1/2" shaft. Maybe there's just a problem with the balance? There is room to go even larger on the shaft.

Here's how it looks installed.

http://i.imgur.com/xBnEzr1.jpg

There's a little over a half inch of output shaft protruding from the transmission.

Re: '66 Malibu N/SA
 

That's plenty big for the shaft.You could use a stock driveshaft in that car.
If you've got time, I'd take it to Phx rack and axle , north of the airport.
See Bernie. Have him check runout and balance. He's the best.
Maybe it's the camera angle, but I don't see any down angle on the U-joint.

Re: '66 Malibu N/SA
 

You can't really tell from that picture.

I just got the slicks dynamically balanced, and the prior job was done with clip-on weights on the inside only. This time they're stuck on in the middle of the wheel.

I have three days, I'll check into that Mark, thanks for the tip.

Re: '66 Malibu N/SA
 

We've always bubble balanced our tires ourselves and use stick on weights in the inside (duct tape) for additional security. Never had a problem. The two times we experienced vibrations at speed it was the driveshaft. Have it rebalanced by a shop that can spin it fast enough. I took one to a local shop and had it balanced and still had a vibration. Mark Williams told.md you have to find a shop that can turn it 10k I believe is the number they gave me. I did that and no problem.

Re: '66 Malibu N/SA
 

Ed, Usually not a problem. They bubble balance at national meets, of course.
But , if you can get the wheel and tire under the safety hood, it's good way to check for wheel runout or a defective or improperly mounted tire.

Re: '66 Malibu N/SA
 

Here's a couple of pictures from my test session, courtesy of Jerry Hutchcroft, of Roddin' & Racin' magazine.

http://i.imgur.com/XYKACSM.jpg

http://i.imgur.com/o5Ns52d.jpg

Re: '66 Malibu N/SA
 

Great looking car!

Re: '66 Malibu N/SA
 

I took the driveshaft in to Bernie today and he found .019" of run-out. He straightened and rebalanced it while I waited; didn't even use up my whole lunch hour. I'm very optimistic at this point.

I also hope to have enough ballast in to remove the headers. Oops--I meant remove the mufflers. My fingers type faster than my brain thinks sometimes!

Re: '66 Malibu N/SA
 

Dave, You found that rulebook section on ballast for Stock Elim.?