Check any dude with 'Import' in his user id! He has done this.
My suggestion, (not based on me having done it my self though) is to run a #2300 Holley 350 or 500 carb, and use the Holley #2300 baseplate. The standard V8 4-bbl plate is similar. They are available if you scratch around. MustangGeezer has a neat link on how he fited his #2300 Holley 500 2-bb carb.
The standard rule is you take the stock hp level, and add another 50%.(Multiply it by 1.5) So MustangGeezer has about 155 hp worth of jetted 500 Holley there with 68 jets, and its possible that there could be 230 plus with Nitrous.
Most stock 200's would have trouble doing 90 flywheel hp as installed. With the stock single jug carby being superheated by the exhast port under the carb, you'll have to look at an exhast port divider and look at a bigger log intake manifold, or a milled adaptor like MustangGeezer's.
On any six cylinder engine, fuel air mix is not well distributed, and any thing you can do to help this will give aditional power.