A different Q on 340 Vs 416

Both engines probably make around 1.15 lbs-ft per cid 345 = 397 lbs-ft and a 416 = 478 lbs-ft. Now times it by 1st gear and rear gear and you get. 345 cid, 2.45 x 3.91 x 397 = 3803 lbs-ft to the tires vs 416 cid, 2.45 x 3.21 x 478 = 3759 lbs-ft to the tires. You were right in the begining both combos would be similar.