Mopar Motor specs back in the day
 

its all kind of interesting to read to see what the motors had in them back then from the factory and what we have in them now lol nothing like Pure Horse power
http://www.allpar.com/photos/plymout...71-engines.gif

what year did they lower the compression on the 440 to 9.5 to 1?
was it 70 or 71?

In 71 the reg 440 was 9.5-1 and the 440 6 pack was 10.3-1

well from what i gather im thinking 71 from where the information chart sits on the page I got it from it was talking about 71 road runners then it posted this chart

i wonder if the cam in the 440 stayed the same all those years?