you should be a little more clear on what you're seeking
champion made three intakes
- the stock intake that they used stock cores and milled the egr tower ,filled it and then ported the runners
champion offered 2 billet rails setups for the stock intake. one was for stock style bolt on fuel regulator the other for external fuel regulator
the champ intake has an engraved ovaled area with engraved serial number on the underside
- the race intake - off center (for production style heads like the GN1 -TA performance and the stock iron heads)
- the race intake- on center (for buick motorsports stage 2 heads)
the race intakes are new casting based on the BGC intake a
these intakes have no egr , reconfigured the injector angles and has a larger plenum opening requiring a unique longer plenum so these intakes were sold complete with billet rails and the plenum because the stock stuff cant be used on them
should note that champion race intakes could be ported to match a set of heads or ported for tall port heads