69 z-28 camaro ?

[Chevy454]

If the 1970 had a copo option with a 454 ls 6, why doesn't NHRA have those available to race?

No 454 in a Camaro *ever*...396/375hp was the largest in 1970...and the only performance COPO found on a '70 Camaro is COPO 9796, which was the tall rear spoiler for the early built '70 Z cars.

Interestingly though, my original Tech Guide does indeed have a listing for a 1970 454/450 (LS6) Camaro, as well as a 1970 454/465 (LS7) Corvette (found in my original Classification Guide also!)...these would have been 2 pretty deadly street combos, too bad they never materialized!