Any of the 67 up 4 barrel intakes will fit, the difference on the 71 up will be more provisions for emissions and no provision for heated choke, your odds of finding both is high, the quad would need rebuilding, what you have to watch for with the quads are the lead seals in the bottom, they all leak, so you have to wire brush them and coat with hi-temp epoxy. Cliff's and The Carb Shop supposedly do great rebuilds and have kits for DIY.
The nice thing is Pontiac V8's were made in droves and it's all the same block so everything fits, there's no small block/big block like Chevy
