First one of @ozsouth's I tried, huge-6.2.9-ubun64oz-ao-PRE.tar.bz2 worked with no hesitation whatsoever. Very fast booting. I had to run it through my zdrv_cp2deb script first and get the filesystem compatible but then it was good to go and everything seems to be working just fine. If anyone needs help with setting up this kernel for Jammy64pup let me know.
Cheers, J