383 cam

straightaxledar said
It has a hughes 2800 in it

I think the performance is hindered with the 2800 stall, in fact I know. A 383 with a single plane intake requires a higher stalling convertor. that includes the camshaft choice as well

fishmens67 said
Everything you list tells me you need at least 3500 stall convertor, preferably 4500