Why not find a late model Mustang or Camaro and start there? Already comes with a V8 in a lot of cases, transmissions are optional.. Play with that and use it as a learning experience. A lot of "speed parts" are available for them and they can do well at the track or street driving. Then as time goes by you can keep your eyes open for something that "trips your trigger" plus you can always cannabilize the mustang/camaro when the time comes...

Food for thought!?!?