Larry Smith did the porting on mine also. Beautiful work. I also use a 337 manifold and an AED 1000 carb. It's an awesome combo and fits under the hood. All of mine making in excess of 700 horsepower.....

68 cuda formula S 588" bb 5sp
70 CUDA CONVERT 500" 5SP (SUBLIME)
70 CUDA CONVERT 500" 5SP (PLUMCRAZY):TOO MUCH HORSEPOWER, IS ALMOST ENOUGH!