383 build no power

Can't spin 215s? Sad day for you.
Yeah that cam want's some compression, or a bunch more stall.And as always "put some initial timing into it"
9.7 Scr should get her moving tho.
Have you verified the TC stall? The carb going WOT with the pedal?the cranking compression?the TDC mark?

So, as others have mentioned; if it's not in the throttle cable not going WOT,or lazy timing, you will be shopping for a TC.Try it again with reduced traction; such as in a water puddle, or on dirtysmooth-concrete.If it won't spin up in the puddle, I think the compression is not where it should be.
How is it if you stomp it at 3000rpm? 4000?

I've tuned teener Challengers with 3.55s that absolutely destroyed 275s from take-off.So cheer up;theres hope for your 383