I would say that's about as close as you're gonna get without timing marks on your cam gears. Unfortunately the 420a timing is pretty sensitive so you'll know if it's off. It'll run like shit or not run at all. What I would do in your situation is go to a local junk yard and ask for a timing gear for a 2g eclipse NT motor or neon 2.0 motor.. bring your adjustable gears with you copy the marks from the stock gears to your adjustable ones and tip the guy at the counter 5 bucks for letting you do so. Go home put the timing on without having to guess.