here is a good steering servo. It is just like the hitec 7955tg servo but made by a differnt brand, I have the servo and i love it.... The second servo would do just fine for thorttle. That tourqe is at 4.8v and 6v i think its like 150 and its plenty there is my set up as far as servos. They work great. There is the engine i highly recommend its on sell and they are great engines. it comes with and extra con rod. Great motor and its on sell. You might kinda have to order around on the parts but at towershobbies if you spend 150 you get 20 dollars off.
http://www3.towerhobbies.com/cgi-bin...?&I=LXPHD6&P=7
http://www3.towerhobbies.com/cgi-bin...?&I=LXMUS3&P=7
http://www.amainhobbies.com/product_...ine-Turbo-Plug