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A heavy BUMP-BUMP-BUMP-BUMP noise as the engine speed is increasing, followed by little or no noise at a steady speed.
Jerry, this pretty much is exactly what it sounds like!
Running at 50 to 55 mph steady or stopped at a traffic light with a lite foot and steady increase to rpm and it quietens down significantly.
Definitely will try to remove a shim or two and see what happens. I'm running 20w/ 50 Lucas oil I may even try to add a Zinc additive also. Nothing to loose.
I used the old fashioned wooden dowel trick and listened to the general area a couple of days ago and was able to isolate the knock to the bottom end as opposed to top end noise.
I have access to a running 261 and just may go that route and update the engine seeing that I have updated the 4:10 gears last year.
Thanks again
