Smog 440 build? Worth it?

My old combo. 76 440 new rings and bearings. 452s shaved .050. stock valves bowl clean up. Isky 304 525 mega cam [email protected]. weiand xcelorator 850 carb. 4.56 gears. 3500 stall. 3500 lb. challenger. best time 7.46 at 92 mph. Strarted with mopar 484 then 509 then the Isky. Went quickest with the Isky. Don't know why? Way over cammed. But it worked.