Ramchargers, 426 wedge.

Back in 1970 there were a could of cars, similar in weight, both made by GM.
1. Car #1 was a Chevelle SS 454 with an LS-5 454 making 450P.
2. Car #2 was a Buick GS with a Stage 1 455 making 360HP. The Buick beat the poor Chevy. Go figure. In fact the Buick was the quickest muscle car motor Trend tested in 1970. That 455 made 510lbs/ft of torque at 2800rpm. I will guess the Chevy made 460lbs/ft at 4000rpm. By the time the Chevelle "turned on" the Buick was long gone" That same year Buick made a Stage 2 that came with the parts in the trunk. the heads alone were nothing short of brilliant. The exhaust port was almost non-existant with VERY short ports emptying into Custom headers as no exhaust manifolds were made for those heads.
Back to the regular stage 1 it came with a rather mild 3.64 rear gear. In the '80's the Buick GS of one Richard Lassiter of Georgia went against many a 426 HEMI MOPAR only to leave the HEMI way back. Torque is what moves the cars. The HEMI's ran 14.0 in most cases with their stock 3.54 gears. Go with a 4.10 or a 4.30 and they had a chance. that year, 1970, the Buick tested by motor Trend ran a 13.38 at 105.xx, not bad for a 4000lb. car.
Many factors come into play as on paper the Chevelle should have crushed the Buick not the other way around.
This why the "tweaked intakes" for our car are worth it, all the low end torque they add. yeah, I'm a Buick guy fom way back. First muscle car was a 1966 Buick Skylark gran Sport with the 401 nailhead motor. Had a 1.87 intake valve and a 1.5" exhaust, less than a Camaro Z-28 with a 302 cube motor that came with 3.73 geaars that were often changed to a 4.10 becuse those motors were not much good under 5000rpm. Enough.