the 72 nova by amt or the amt's 76nova is a prostock kit vega kit by them too... if you want promod or prosportsmen class theres two of them revels's 55chevy or 57 chevy
if its a revel's 40 then find a small block ford out of a 32 ford kit would be cool or a hemi out of the 5window kit that 5 window kit has two motors so it a two bagger. it a win win