I assume what you refer to is AKA Scuttle Shake.
Are there any original owners on the forum that can attest to the abscence of this shake on a new off the lot Big Healey?
My plan of attack has been:
1>New rear suspension (leafs, shocks, bushings). Done
2>New Drive line mounting hardware (Motor, Transmission, transmission rear mount bushings). Done
2>New hubs all around (obtained but not installed)
-awaiting 3&4 below
3>Front end rebuild
-bushings, kingpins obtained
-awaiting shocks, springs funding

-requires one shock tower top replacement (obtained but awaiting welding plan)
4>New wheels (Awaiting 2, 3 & funding
5>Steering gearbox etc rebuild, bushings, ball joints (Probably done with 3 above) (more funding
6>U-joint renewal. Done last weekend.
My hope was that by doing all the above I would reduce Scuttle Shake or at least change the speed at which it occurs. I usually just live through (read accelerate) it and some times think about astronauts during re-entry.
What am I missing?