413 vs 440??

preciate the replies again. after reading all of your posts and looking at some sites ive gained alot of valuable info. this engine has a cast crank, 8.2:1 compression i believe. 902 heads....im looking for like 450-500 horsepower and around 500 ft lbs of torque. im not gonna go to the track much. just want a nice fairly quick fun car to drive....so do u think i should cough up the 500 bucks for this engine or hold out for another one?