You may be right on the price, but according to Mecum - it is the original block.
"This frame-off restored 1968 Pontiac Firebird Ram Air II is exceptionally rare. A late production example, it is one of a total of 110 built and one of 98 with the M21 close-ratio 4-speed. Restored over 18 months between 2002 and 2004, it retains its factory original matching numbers WU L67 Ram Air II block, original RA II-specific round-port code 96 heads and matching exhaust manifolds. Rebuilt to AMA specifications, it maintains the correct 10.75 compression and original cam and valve specifications, generating an estimated 430 to 440 HP at the flywheel."
There's more, but I think you get the point - it's a nice car.
The only thing better, would be say all original never restored with just 5,000 original miles.
