1968 Match Race '383 Road Runner' vs 'Cutlass 350 Ram-Rod'

I LOVE my 1968 Road Runner. Nicer than an Olds.
Real world?
I am the second owner - bought it from the original owner in 1993.
STOCK 383 Carter AVS, 727, stock manifolds but has glass packs.
I added a 3.91 sure grip (it had 3.23s).
How's 14.40s all day long? Yep. STOCK.
I don't know how some of you are claiming 14.70s at best?