A 470 is 4.375" 400 block with offset ground 440 crank, new stroke is 3.91, and rod journal is 2.200", bigblock chevy size.

A 6.535 chevy rod will give bore/stroke of 1.67 which is good for street but you could go even shorter on the rod to 6.385, which is bigblock chevy +0.250 length, giving R/S ratio of 1.63.

Zero deck with the 6.535" rod is 1.490 CH
Zero deck with the 6.385" rod is 1.640 CH

The 470 is quite close dimensionally to a 455 buick engine and those engines liked to rev, at least until they blew due to oiling issues. I loved my '70 GS455, it was a blast to drive. Your 470 will be even better because of stronger and lighter components.

Under no circumstances go longer than 6.535 on the rod length, not for a mostly street engine.

R.