Mopar performance 360/380 hp crate motor

Very limited experience with crate motors but I’ll share one story. A friends boss bought one, 360-380hp and a /6 duster to put it in. Gutted the car, installed 6 point bar, Dana 60 with 4.88s, worked 904 rmvb, and some 28” slicks. Think he ran an 850 Holley on it. Drove it to the track, ran 11.90s and drove it home. At the time (1999-2000) I had a w2 360 in my dart and he out ran me. I kept thinking what did I do wrong. I do think his car weighed 400-500 pounds less than my car, or at least that’s what I choose to believe. Seems they made good power for what they were.