in my spare time I'm building a toy car (1989 Bronco II) and I've found out the Eldlebrock doesn't make heads for the 2.9 and I'm wondering if anyone else makes after market heads (4 more power of course)and such things as Headers or anything else that would make my project look and feel badder. I'm putting a 3 inch body lift and big meat tires on, which brings me to another question- can the speedometer be adjusted on this toy truck :-&