[ZO6 Bryan]

On to the valve spring install.
Used the BTR .660 lift platinum kit with titanium retainers.
Purchased the Comp Cams tool for the valve springs. Still it's a pain in the ass and can't be rushed. Be prepared to chase valve locks and retainers under the car.

I used a soft nylon rope about 3/8" dia. to hold the valves up. Push about 1 1/2 ft into the spark plug hole and then turn the engine by hand until it stops and the rope wedges against the valves so they can't drop.

A gentle tap with a small hammer will pop the locks loose if they don't come loose right away with compressing the springs.

Old valve seals easily wiggled off with pliers.

Put grease on the new valve locks and it will help keep them from falling off the valve stem during reinstall.

New parts from BTR
Seats go on first.

Then a 12mm deep socket works well to press the new seals on.

Reverse procedure to put the new springs retainers and locks in place.

Repeat 8 more times.