[blykins]

No, the 427 was a rules engine, with Oliver rods, a factory 391 crank turned down to BBC rod journal sizes, highly modified LR heads and a 2x4 LR intake, etc.

However, you don't have to have billet internals to hit 6400-6500 rpm. I wouldn't trust the factory rods for an application like that, but with new rods and some rocker studs/end stands, I'd let her have it and not think twice.