I found a good set of videos for replacing the heads on the DOHC 6g74. Thought I would pass them along.
Head Gasket
https://youtu.be/hscpxN0Exs0
Lifters
https://youtu.be/9feaFDSJGO4
Valve Seals
https://youtu.be/17atJcsk5rE
Cam Oil Seals
https://youtu.be/prseecddLZI
Valve Cover Gaskets
https://youtu.be/kzUA9mSW2l0
Exhaust Manifold
https://youtu.be/-mDX0I-CnuE
Intake Manifold
https://youtu.be/1pJhGP-1RGY
Full Video
https://youtu.be/cwRayAwhAXg
Head Gasket
https://youtu.be/hscpxN0Exs0
Lifters
https://youtu.be/9feaFDSJGO4
Valve Seals
https://youtu.be/17atJcsk5rE
Cam Oil Seals
https://youtu.be/prseecddLZI
Valve Cover Gaskets
https://youtu.be/kzUA9mSW2l0
Exhaust Manifold
https://youtu.be/-mDX0I-CnuE
Intake Manifold
https://youtu.be/1pJhGP-1RGY
Full Video
https://youtu.be/cwRayAwhAXg