I have the comp xe256h in a stock low compression 360 runs great but the difference is I have 318 heads on it currently chocking it down. Once I have my ported J’s on, I Bet the 262 or 268 comp or Lunati cam would compliment the engine a little more. My motor falls off around 4500/5000rpm it’s probably the heads more than the cam. Great power for a cruiser though, that 262 will get you another 500/1000rpm range but you have to consider at what rpm range are your driving the car. I don’t ever have to bring my car past 5,000rpm but it would be cool if I could. Those h116cp with a 262 or 268 I bet makes great power. Your engine builder sounds like he knows what your after. That’s a good signal. Good luck.