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I'm getting 350hp 380 on the torque out of my chevy k5 without stroking or putting a blower on it... I'm running it stock 350 with vortec heads, gm performance intake for TBI, mild rv cam, 454 TBI, and custom computer chip...

I believe the chevy 350 HO is around 330 on the HP... add a better cam to that motor (and that motor is 2 grand) and your in business. chevy performance had an article a while back on using that engine with a chevy performance hot cam etc. for around 400 HP (if I remember correctly, but if was definitely over 350)
 

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Roughly, the 383 addition will add 25hp/50#'s torque, over what you already have designed in a 350-the wilder the motor, the more you will get from it. The 383 cranks are cheap, and not a horrible idea, once you have dealt with the heads, etc, all the important things.
 
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