It would make more sense to have more tutors for artifacts in decks instead, since a tutor for artifacts can search for both Vehicles as well as other types of artifacts (hint: Boommobile can combo off with two other artifacts Cogwork Assembler and Panharmonicon)
The 1/1s you get from Young PyromancerYoung Pyromancer and Third Path IconoclastThird Path Iconoclast will be nice for blocking, but youre not likely to amass enough to win a game with them
Survival of the Fittest to Fauna Shaman Survival of the Fittest is a two mana green enchantment that lets you discard a creature to tutor any creature from your library directly into your hand, and it has been warping formats since 1997
If the source with infect also has lifelink, damage dealt by that source also causes its controller to gain that much life
At the moment, I think we have enough on-theme ways to draw cards, but if we're ever lacking in draw power, I would probably start with Remora