Ok,I'm going to be building a 400 this winter. I'm not sure what to use as an induction system. Right now I had TBI for my 305. Would I be able to get larger injectors and still use this tbi unit? I'm sure TPI would give me some more power and easier to use a blower on if i ever get one. Would a TPI manifold unit feed it? The engine red lines at 6200 rpm so... Would I need to go carbed or use a mini or super ram in order to get the full potential out of this engine?
Note: the block is out of a '70 or'71 impala

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Flowmaster,Edelbrock open filliment filter with K&N filter in it
160 stat,

 

The cheapest/fastest/easiest route would be to stick a carb on it. TPIs usually run out of steam at 4000 or so, tbi is about the same.

 

Yeah, cheaper for how long? A carb would drink gas feeding a 400 wouldnt it? Of course building a 400 and worrying about gas millage are really opposite concepts. But I see your point. Anyone else?

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Flowmaster,Edelbrock open filliment filter with K&N filter in it
160 stat,

 

Fellow out here feeds a 434 SBC w/AFR heads in an '89 Vette with TPIS Miniram. The thing idles like a kitten and runs low 12's at this altitude.

If you're willing to spend the bucks, the Miniram would be sweet. The TBI would require a better manifold and probably larger throttle body along with larger injectors, and you would probably still wish for something better.

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82 Berlinetta, orig V-6 car. Rescued w/86 LG4/TH700R with all harnesses, sensors, ECM, etc. 3.08 open, cat-back from '91 GTA, Accel HEI SuperCoil. AMSOIL syn lubes bumper-to-bumper. Daily driver, work-in-progress (LB9 w/ZZ3 cam, World 305 heads, exhaust, paint, etc.).
57 Bel Air, my 1st car. Currently 396 .030 over, Weiand Action+, Edelbrock 1901 Q-Jet, Jacobs Omnipack, 1-3/4" headers, TH400 w/TCI Sat Night Special conv & shift kit, 3.08 10-bolt, AMSOIL syn lubes bumper-to-bumper. Best 15.1 @ 5800' Bandimere. Daily driver while Camaro was being put together.