By 3sge I assume you mean the earlier fwd/transverse type, not the later rwd beams is200 type as that is certainly out of the budget What type of power do these make and would there be any benefit over say a sr20de or similar?
Budget, I suppose around 2k might be expected as it is a longer term prospect, that can be flexible though. It doesnt have to be registered, doesnt have to comply with emmisions, doesnt have to be fuel efficient, doesnt have to idle well etc, so in the case of efi I guess a cheaper second hand microtech or similar may be the way to go.