drag racing gear ratios

[metro1]

hi has anyone got any advice on picking a set of gear ratios to use for drag racing, the box im using is a ford type 9. Im planning on putting between 220hp and up to a max of about 280hp i know im going to fit a quafie gear set the car will weigh in at about 650kg and wont be used on the road i have a budget of about £1200
has anyone used firstmotion transmsions or road and race transmisions in seven oaks any opinions or recomendations would be apreciated