i have a 1964 283 the stroke is stock and the bore is 3.97 i have on it 461 double hump heads with a high lift cam high rise intake (edelbrock torquer) and a holley 4160 600cfm are there any guesses as to how much hp i have it was out of a truck and i think it had around 180hp stock i was thinking i now have around 290hp at the crank what do you guys think kinda a dumb question but i cant exceed 300hp because the motor is going in a porsche 914 and this stock 901 transaxle will not hold very much hp so i have to keep the hp to a minimum until i have the money for a 930 transaxle i figured that the 283 would be a good choice