True horsepower?

Hot Metal said

ok well if Moroso says 285hp for my on track hp, and factory stock is 275 or as some say its underrated, that don't say much for my add-ons/tuning:(
but if you go by wallace@302hp its more in-line perhaps. Basically then if you put the same 8x26" slicks 3.55 geared bone stock 727/340 '70/'71 Cuda it would run 13.3's from the factory?

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That' possible on account of the factory polyglass tires were still screaming going into 3rd gear. There had to be a half second in that alone.
The Manitoba government built a huge ditch to divert spring floodwaters around Winnipeg in the late 60s. The gates were about a half mile from our house, and had a concrete roadway over top. We used to go down there at lunchtime in grades 11/12 and see who could lay rubber the furthest. Swinger on Polyglass tires for the win! But you know,street tire technology was in it's infancy back then, and it hardly mattered what tire or how big it was, 340s just roasted them all. I owned that car for 4 years, and put 7 sets on the back, even running some custom slapper bars. She went 14.41 on those little Es
4.10s were a colossal mistake on the street. But after I blew the 3.55s up, This 18 yr old know-it-all said what the heck, the whole pumpkin, LSD and all was $65.00,sooooooooo in it went. That 340 blew a lot of stuff up, including itself,finally.