Disappointed in my 383 on the Dyno

Sadly, when I built my 470 from a 400, we used nothing at all from that engine, except the block itself and the main caps.
I will be in the same boat as this is a bare block. The only positive is i can upgrade the main and end cap to the billet alumn/girdle with arp bolts right away. I am torn on which stroker kit to go with but i leaning towards the 512 from 440 source with the 11.1 compression.... thoughts?