Big Block or Small Block in my 70 Duster

Thanks for the input!! The 440 I have should be about 450 hp on pump gas. I' ve got about $3K into the rebuild - was going to put it in a truck project that never materialized. It's 9.25:1 with forged pistons, .480 lift 284 duration cam, Performer RPM intake with 750 Edelbrock carb, 452 heads with stainless valves. etc.

I think I would be OK with manual steering - would like power brakes. My car has factory power discs on the front. Will probably add discs to the back too.

Did you guys upgrade the torsion bars to account for the extra weight in front? Mine seems to sit pretty low with the /6 bars in it. Obviously subframe connectors will be a must!!!

Would love to see some engine pics with the big blocks installed! Might help me make a decision!!

Thanks again for the help!