3.68 standard to 4.25 inch stroke, and a few inbetween available if you can afford it.
i'd guess an enterprising chap could get a slant crank made, i bet there is a mopar blueprint doc for the 225 crank somewhere.......
send it to them and ask for a bigger stroke :)
i guess that expense should be weighed up against say SCAT or someone US based doing the job.
one presumes Newland group know mopar stuff due to doing work for Australian and US based companies. you can have the packaging printed with whatever you want....