Who's idea for the 68' Hemi Dart

Correct,

The 1968 'LO-23' Dart's and 'BO-29' Barracuda's

1968 426 'Race Hemi' Engine

* 12.5 -1 Pistons {Heavy TRW Forged Slugs}
* Stock Cast Iron Cylinder Heads
* Stock 'Mechanical' Camshaft
* Stock Valve Springs
* Aluminum Cross-Ram Intake
* '2' Holley #4160 {770 CFM} Carburetors
* Stock Oil Pan.