The ThermoQuad (TQ) is the plastic bodied carb. The aluminum bodied carbs are AFBs and now AVS that they are making again (I can't remember if it's Carter or Edelbrock) The TQ is a good carb the resin body keeps the fuel cooler and the spreadbore gives good mpg (small primaries) and acceleration (big secondaries). Main problem is like any emissions era carb they are complex and therefore harder to tune and the plastic body warps, in which case you are out of luck. Rob _________________________________________________________________ Add photos to your e-mail with MSN 8. Get 2 months FREE*. http://join.msn.com/?page=features/featuredemail