OK here goes the Gonkulator shootout.
I have the Gonkulator running today anyway, wringing out 428 Catalinas as featured in the Dec 2018 Hemmings Muscle.
So here goes: T=Torq P=Power peak
69 Mach, Mharvey car, curb=3710 guess w pspb,ac, full tank, modern street rubber, good granny shifting but not destroying the driveline.
1358-101.8 bone stock 428cj 475T 380P 206-220-116
1378-100.7 434as-dynod 455T 355P 204-214-112 this is what the dyno said. Still not so bad!
1365-101.7 434tuned 460T 376P 204-214-112 same engine/cam you have just tuned up!
1346-103.3 comp280 461T 409P 230-230-110
1342-103.6 isky280 462T 418P 232-232-108
The Isky will sound meaner, and runs half a carlength better. But, its way into end-stand territory so there's that.
Depends if the couple tenths is worth dealing with a new cam/valve train.
Then again, clean bragging rights of "well over 400hp" would be there, which is what many magazines claim a bone stock 428cj makes.