The next step

Well I have truly enjoyed my first two seasons of drag racing with my 318 valiant. It is now time for my winter projects and to build up for next season. So what I have done is trade my valiant for a 69 road runner drag car roller. Has everything but a motor, trans, and shifter. I plan to keep this car and race far more events next summer. The car ran 9's and is a pretty nice start. What I need now is a motor and trans set up. I would like to run a similar time to my dad in his 41 Willys. He runs a 10.5. That would be fun to be in the same class. I want to put a 440 in it since that is what it came with. I will run a 727 also. Car has 4.56 gears, spool, cage, msd 7, lots of fiberglass parts and frame connectors. So it is done for my purposes. I would like to know what you all think I would need to get to my time goals out of a 440. I do not have a motor yet so are there certain years I should go for? Also how would you build it. I was thinking a 600hp build would do it. Thanks for your time