Old SB intake manifolds

No inventory on the engine specs as it was bought via a broker. Car weights just south of 3000 lbs, TKO 5 speed, 4.56 gears, 28.5x10.5x15 tires. Was told it was a 10 second car in its time producing over 425hp on a chassis dyno. Personally I take everything with a grain of salt until I can verify. The Duster has not seen asphalt since early to mid 2000s. Trying to shake things out and bring it up to compliance. Had it on the track several times but only to learn its behavor and how safe and straight it is. So far so good but have never push it.