What would it take to make 1.44 lbs-ft per cid ?

273 said
400-430 lbs-ft is 1.33-1.43 lbs-ft per cid is it possible yes, likely probably not. Is it needed for 350 hp 300 ci engine probably not.

1.25 lbs-ft per cid x 300 ci x 90% (tq @ peak hp) = 338 lbs-ft @ peak hp.

350 hp x 5252 / 338 lbs-ft = 5438 rpms

350 hp @ 5438 rpms and 375 lbs-ft @ 3900-4400 rpms.

A 300 ci engine making 420 lbs-ft would make 350 hp around 4850 rpms.

I’m not here to argue with you, I’ll just do it. I’m lucky to have a mate who has written tech articles ( not R.E, an Aussie) who says it’s very achievable, not only that, he’s done it with our local 308 holdens.