So at no point do you discuss compression ratio due to the poor piston selection available for 383's... Then you grab a cam selection that in a low compression 383 is gonna offer zero balls till at least 2500 RPM's?
And someone posts "Somebody call the Smithsonian - best thread ever! Sticky that ^"
Might wanna take those 440 Source Stealth heads in & have them milled to get the chamber volume down in the 72 cc range... And stay with the smaller cam options or get lots of gear & a loose convertor or a 4 spd...
OK, so you want to target me for making suggestions, fine, but at no point prior to is it discussed what the cylinder psi is, or if its been verified an early or late 383, if it's been blueprinted prior, etc. etc. , So gig on me for assuming/not assuming a couple of things, but it seems to me that your guilty of the same.
Also, not all of those cams are that aggressive; I have a 440 with a 284 PS (which has nearly 241 duration @ .05 lift, and .484/.484 lift) in it that is a bone stock 73 low compression bottom end (only has 105psi cranking on average) in a 79 dodge W150 and it has torque off the bottom in spades. All it took was removing the Holley Street Dom. Single plane to wake it back up and putting an Eddy rpm on it. Burns the tires with a stock converter, hunting gears while spinning until traction is attained. No I didn't build it originally but I fixed its issues best as I could without tearing it down.
Any newer casting 440 source heads only have an 80 cc chamber to start with and with a .030 cut will be around 75cc. I also selected 4 different cam kits all different lift and duration, of which yes, they have more lift than a stock 383 magnum cam, but less overall duration, and only slightly more @.050. So yeah I threw some hotter sticks in there, but it was for the OP to look at and determine from what his known combination is whether or not to use.
The last Comp kit is pretty damn tame to be honest.