So, install new guides, and hardened exhaust seats.
Machine and finish grind seats(valve job), and mildly blend bowls....... along with a mild tweak of the short turn to help keep the flow from backing up over .450-.500 lift.
These are being paired with a .470-ish lift hyd cam...... and exhaust manifolds.
Lift———in/ex
.100—- 69/46
.200—-132/94
.300—-189/129
.400—-211/149
.450—-211/155
.500—-213/159
.550—-213/162
.600—-213/164
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