does any body know of a good throttle body spacer for a reasonable price..

 

A tb spacer won't really gain you much if anything but a line in your mod list. With the torque curve peaking very low in the RPM range already on the 4.3L, a spacer will only lighten your wallet.

As far as one for cheap, you could make one yourself fairly easily, but you'd have to make a gasket as well.

 

If your talking about TBI then what I did was upgrade to a 670 cfm TBI from a full size truck.