Thank you for your answer!
And that bring me to another question:
The Jaguar axle has those rather large aluminium hubs uttermost on each driveshaft. The ones which holds lower arm fixed correct with the driveshaft.
The hubs hits the '34 frame with an inch or so when the rear axle moves upward. If the axle had been about 1 1/2 inch wider on each side the hubs would have gone on the outside of the framrails an allowed the car to sit lower down.

I know these hubs probably are made this big and strong to be the "crash point" against the Jaguar's underside. I also know the crash point on a hotrod where the hubs goes on the outside of the frameralis actually will be the driveshaft, which can result in loosing control of the car since the rearwheels will change position if the driveshaft get bended.
But my thaugt was to make an new crashpoint on the outside of the framrail, but higher up than underside of frame.

How about cut off some of the edge on the hubs to make them narrow enough to pass on the poutside of the framerail? Are they still strong enough?

Or do I have to make the frame more narrow at that special point to lower the car as much as possible?