Timing Gear Drive
I also drooled over a gear set at one time, I truly never found a good reason to install one though. I have replaced more perfectly good timing chain sets over the years than I care to remember, cause when you rebuild that is one thing you always freshen up.
Summit sells a real nice
8* adjustable double roller timing set for $75 - you can always add a tensioner if it makes you sleep better at night, but I doubt chain stretch/slack will adversely affect a street driven motor within the life of the build
But for my money,
the Cloyes True Rollerbillet set gets the nod for $112.