is this true about a 350 sbc vs a sbm

Went to school with a big Chevy guy. He had a Z28 (maybe 78 or 9) with a 350 4bbl auto. and 342 gears, all factory with low miles. His dad built drag car motors and raced. He had the Camaro "tuned" to the max. My 72 demon with a 318 and 2.76 gears beat him, and our little school "motor heads" were in shock. We went from a 10 mph roll and yes I let him punch it first. Yes, he admitted it. The only mod done to the 318 was a 600 holley in place of the 2bbl. I used a cast intake to mount it. More cubes, More gear, still not enough. See? Yes, any motor can be built to perform, but what about how they were manufactured? Hmmmm.