Handbrake cable routing can be accommodated into a higher hoop by welding in lower carrier bracketing/frame to in effect keep the handbrake cable standard. I believe the hoop for the four seat version is in fact higher and might be a good starting point to re-mod for monty. I also think that if you gain that amount of travel for the suspension/shock's you would still be able to fit bump stop protection to the shock of a size that would probably never come into play but it would be nice to know its there just for that once a year fright!
Your'e totally right about the softer front end improving the whole ride but on the standard sliding pillar set up it will never be possible to achieve Monty's wishbone positivity or travel. Did you buy Monty for that set up or were you pleasantly surprised that it was fitted. I so wish it had been made into a parts kit which was readily available but I seem to remember there being a lot of poo-pooing of it at the time as it couldn't possibly a trad Morgan if that was fitted! It could have been a real move forward for the classic in its last ten/fifteen years of production as the cars in performance had moved from a B road Sunday driver to a bit of a sporty number and the limitations of the 1936 4/4 front end became very apparent. Morgan have now gone where Land Rover did with the new Defender and there is a massive gulf between what existed four years ago in A Morgan car and the current configuration. Apart from these two examples in the car world only the Bugatti had done this although it was more a badge re-birth than a transitional car.