Jones recommended a hft 264 lobe for a 9.7 383 over at FBB0
you can directly compare Jones hft hr solid roller and sft as he uses lash + .006 for everything (lash = 0 for the hyd cams)
I like his 256 mopar .305 lobe lift hft
grind for 9:1 and lower motors
AJ your post 76 the 260 mopar @ about .008 is about 268 in .006 terms typical of its era it is not a high lift cam but for stock heads
it wears very well with a big fat nose- but not compare well in the .300 lobe .450 valve lift area
