I'm a little confused by the list of RPOs such as K66, J56, F41, etc that were bundled with the ZR2 package, but were not available on other Vettes. Why were they RPOs then, rather than just additional "special equipment"?
In any case, here is my list:
RPO Z-11 Impala features
* The 427cid engine itself: special crank, rods, pistons, heads, cast push rod guides, intake, valvecovers, water pump, air cleaner, oil pan, balancer, flywheel, hollow fuel pump rod, fuel lines and filter, plus misc. fittings, brackets & springs
* Special suspension, including Corvette Z-06 brake backing plates with unique metallic linings, unique coil springs & ball joints
* Special roller type rear axle bearings, retainers and studs
* No body sound deadener
* Cowl induction
* 15x5.5” wheels
* 4.11 positraction rear axle
* Aluminum body components, including hood, hood lock support, front fenders, front and rear bumpers & brackets, front splash shield, grille brackets, fan shroud, battery tray
* No other options available
* Only 50 of them were built just to satisfy NHRA’s requirement for Super Stock.
None of the above was standard equipment with any other 409 car. And the only items above that were optional on other models are the 15x5.5 wheels and the 4.11 posi.
Verne
