The only thing that I would change is the carb. A 850 is more than enough. Plus it will idle better.

Dyno-the power is in the roller. A flat doesn't have enough lift and duration to let the engine really breathe.

I HAVE NOT HEARD ANYTHING GOOD ABOUT THE COMP CAM ROLLER LIFTERS.MY ENGINE BUILDER SAID HE LOST 2 LIFTERS ON THE DYNO IN 2 SEPERATE CASES.HE NOW DEALS WITH CROWER.