"Actual Match Race" 1969 440 'Cuda vs 1973 Firebird Formula 'SD-455'
I'll find the documentation and post it.
The 1973 SD-455 was planned to have 10.25-1 Compression, which was
obviously shot down, due to EPA Emissions and other regulations.
The Camshaft was supposed be the #041 Unit.
{.470" Lift/.470" Lift ~ 308*/320* Duration ~ 87* Overlap}
Also, was supposed to have an Aluminum Dual-Plane Intake.
And 'solenoid-activated' Flap for 'Cold-Air Induction' through the Reverse Shaker Hood Scoop.
Was to be rated at 380 HP.
All of the above 'Items' were not installed, due to Emissions.