your opinions please

I am stuck between a 630 hp 418 or a 740 hp 470. I have a 416 in the car now but I want more power, so I am thinking of going either route. I am wondering if it is worth the time and money to go to the 470. I figure about 4500.00 more for the bb.
The car is a 72 dart with auto and the street lynx and a 8 3/4.
Author: admin