I'm considering running the 509 cam in my 440 and wanted to know if anyone has experience with both 509 cams, the improved streetability version and the original. What sort of differences were there in street driving. Things like fuel consumption, throttle response, idle, brake vacumm etc. My 440 is 30 over, cast crank, ly rods, l2355 trw pistons with the block machined for zero deck height. Heads are ported 452's with 2.19 valves, torker manifold and I will probably use either a 750 or 800cfm edelbrock carb. Car is going to be mainly a street car but I want a tuff sounding 440 that runs well on the street. Anyone with experience with either of these two cams or any other recommended hydraulic, feel free to give your opinions