Better heads would likely wake up the 541 nicely but the smaller ports I've got might make it feel a bit more responsive on the street. Just what a 5300 lb cruiser needs. [/quote]
My guess is where the crossover point is for best torque between small and large port heads would be a big deciding factor. Look at the size of gen3 hemi ports compared to thier engine size. An example would be your current heads versus a 440-1, and fuel injection to help level the playing field. I bet a ported 440-1 head with a short duration cam and 1.7 rockers might be killer on a 541. Another example is the factory heads for hp 383 and hp440 were the same, along with the same cam!

Come to think of it, i have a set of killer 440-1 heads, 1.7 jesel rockers, and most of the parts to build a 580 inch street bruiser! Ok, now to find a perfectly clean Chrysler Imperial, 😁