I have a 350 zz4 crate enginein my '33 Vicky. Since I can't leave anything alone I'm toying with the idea of installing a different cam to give it a "lumpier" idle, gain a bit on the power curve/hp and install roller rockers this coming winter. The engine does have Aluminum heads and I'll have them ported to the intake as well. I'll also add a set of exhaust dumps.
Since the engine will be out I've also thought about changing the timing chain out to gear drive. I love the sound of an engine Idling along hearing that "noisy" blower like sound.

Any pros or cons on using gear drive timing ? I'm thinking of using a Pro-Comp set--anyone have any recommendations or comments.