Need A Forged 383 Crank

From what I know those heads are way too big for a 383. Indy specializes in 450 cubes and up. Those heads with the CNC porting would be marginal even on a 440. As for the crank. The nos won't hurt the cast crank so much as it would the pistons which are forged and the right choice if you plan on using nos. The crank should be OK on a 100 horse or less shot. I have a cast crank in my 360 and spin it to 6500 with no problems. That's with about 12.1 compression. Any more RPM and compression than that, you definitely want a forged crank. What RPM are you planning to turn the motor? If you use those heads and want to get power out of them your going to have to spin the motor pretty hard. That cam runs out of poop at 6K so I'd recommend taking those heads off and going with a set of Edelbrock's. I've heard from many that they love those heads for street/strip motors. As for cranks warping... so I've heard. Stick the crank in the block with the bearings bolt em down and spin it! If it turns by hand easily your ok. If you really want to be specific use a torque wrench to measure the force required to spin the crank. If it's around 6lbs or less the crank is plenty straight. How about a stroker crank for the 383? Demon seed is also mucho correct that you have to match all of your components together to make the package.