"What do you recommend? I thought those 9 key crank sprockets were terribly unreliable."
The Rollmaster 9 keyway set is DEAD NUTS on the money for moving the cam and on the upper end for quality with roller type timing sets. Those 3 keyway sets not so much. They are usually pretty close dot to dot at the "zero" keyway, but after that they can be all over the map for where you end up at from what I've seen here.
I've installed a number of Rollmaster sets in customers engines, they seem to be at the top of the pile and marketed by all the big Pontiac shops and used my most Pontiac engine "builders" from what I've seen.
For my engines I use the factory 3/4" wide stock Morse timing sets and offset cam keys if I need to move the cam.......
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https://cliffshighperformance.com/
73 Ventura, SOLD 455, 3740lbs, 11.30's at 120mph, 1977 Pontiac Q-jet, HO intake, HEI, 10" converter, 3.42 gears, DOT's, 7.20's at 96mph and still WAY under the roll bar rule. Best ET to date 7.18 at 97MPH (1/8th mile),
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