Gear drive timing set

A gear drive will probably actually put less load on the front main. Instead of the crank sprocket trying to "climb the chain" forcing the crank to the top of the bearing, the crank only has to turn an idler gear which is on it's own shaft to carry half of the sideways thrust. The loads will be trying to spit the idler gear out sideways. The idler will need a high capacity front bearing with a dedicated oil feed. The Milodon setup uses dual idler gears which use opposite thrust forces to balance, but neither has a direct oil feed.

The picture shows something that looks to be pattered after a Pete Jackson single idler setup for like a third of the price. Might be good, might fail and leave you with bent valves and a crankcase full of shrapnel. A $75 roller chain set will run for years and do everything the $120 gears will do except make a lot of noise. Why would you want a lot of noise? It's either going to sound like a worn out timing set (hacker) or the blower you don't have (poser). The factory used chains for a reason, they're cheap and they work.