Could you locate and post a few E.T.'s and 1/4 mile times for the 68 HO, 69 HO and 69 Trans Am? Of course not solid proofs, but ideally.
From what I have read in the past, according to Hot Rod and Car Craft (and from some GM paliterature) the 68 HO was faster than the others. I have yet to locate and RAI or II independant tests of non modified cars (Royal/Myrtle)
1968 Firebird 13.79@106 400 HO 335 four-speed HotRod 3/68 1970 Trans Am 13.90@102 400 RA 345 four-speed 3.91 HotRod 2/70
Si Vis Pacem Parabellum
1967 Starlight black PMD Engineering 400 Auto 1968 Alpine Blue 400 4 speed 1968 Verdoro Green 400 HO 4 speed 2013 1LE 2SS/RS Inferno Orange Camaro.