No affiliation.
Link:
https://detroit.craigslist.org/okl/p...954038870.html
Text:
Ultra rare Pontiac OHC 421 SD
OHC .. Over head Cam
421 Super Duty
This is the only experimental ohc421sd motor in the world.
1 of 1
Designed at Pontiac by Malcolm (MAC) McKellar and John Delorean .. and obviously other engineers.
$250,000.
Attention - Pontiac collectors