I think your combo is well balanced for mid-range power
. The only thing that I think that needs improvement (IMO) is the exhaust and maybe a 2000 rpm stall converter ?. Shorty headers look cool but don't flow much better than stock manifolds. I'd put a proper set of headers on it and "X" pipe hooked up to your dual exhaust. But it's something that you could change later.
Let us know how it goes once you've run it in.