I'm not telling you either combo is wrong.
For best combo in an engine that is designed for best all around performance, the "on Paper" and manufacturer's CYA is not in anybody's best interest that's trying to have all their components work together.
Rather than feel that I was putting anybody down, maybe re-evaluate what you have.
If you're happy, great, run it as you built it. I'm posing questions and bringing forward some future questions that will pop up in all blown applications. I just want the set up to be at it's best.
Pat if this poster had your experience, he wouldn't ask questions here for help, rather, he'd be going in a different direction.
Back to what I was getting at, blown69camaro, do you like the sound of the tighter LSA? Did you really research the cam selection for your cubes and street application? CFM, is it for show or how did you come up with that? Run out of road before you run out of CFM or carburation. What? That makes no sense for a cruiser or a street rod or even a drag racer. It has no meaning for your efforts.
It's an off the wall combo and if it works, more power to the project.
Yes, an overbored 454 is not very big and you could use a better cam and re dial in your carb thinking. I still haven't heard what boost you're running or planning to run or how are the carbs setup or dialed in. Nor the reason for the valve question that started all of this.
I just posted some queries and I stepped on toes........hey, I kinda like that too.