The early-70's Pontiac Firebird 230 cubic inch OHC six had a Quadrajet available as optional equipment. The calibration of that carb would be pretty close already, without a bunch of jet or metering rod changes. It might be a challenge, getting that one adapted to a 235, but it's probably possible to use the 4-barrel manifold that's already available, with an adapter plate of some sort. It would definiotely be a conversation piece with that carb installed!
Jerry