if my 440 can run low 10.20 as a 30 over 440 with old indy heads flowing around 330cfm and a 262@50 cam 640ish lift a 470 should have that covered.
our street stock pulling class has a 470 cid limit and i was thinking on that to try and use my 440-1c heads and hope the 30 extra cid helps the ported heads to make torque.
for a car to drag race i my self think the shorter rod will 60ft better.