K20, yep that 327 likes to rev. With an over-load of green birch, the motor wants 3000 rpms between shifts. Steep inclines, 4-5000 rpms between shifts. Couple times I hit 6000-7000 rpms without issue. Gets there in a nano second.

T-zone, yah the 67-72 are some dmn good lookin rigs. Very little emissions madness. Engines of the era put out good power. Just pulled another 292 from an 80s chevy 3/4 ton.
It's going in my 1972 k5 blazer. It's mustard yellow.

The k20 is getting 4:56 geared m1008 cucv axles. 14 bolt rear with Detroit locker, Dana 60 front with a limited slip. That's how the military axles came. Direct bolt swap, that's the joy of 67-72. Parts commonality over a broad spectrum of years and models.