Any 318 Performance tips?

Pulling the slant and installing my 318.Is there any cheap performance things I can do to the 318 before I drop it in.I can not afford different pistons or heads right now... Here is what I have a rebuilt 1974 318 with 10,000 miles on it.Stock rebuild with Lunati 284/484 cam, double roller timing chain,weiand intake,650 Holley, Doug's headers,2 1/2 Summit exhaust.Oh and a 4 speed tranny.
Here is what I plan on buying....Summit Racing ready to run distibitor,summit 40,000 v coil,Taylor 8 mm wires,Mopar Performance fuel pump,.028 head gaskets,355 suregrip 8 3/4.I was thinking while I had the heads off I could polish the chambers and ports,but I may be wasting my time since the heads are small valve open chamber heads.

I had two dart sports with stock 318's with 4 bbls ,manifolds and dual exhaust and they ran pretty good.So the Duster should run a little better. I have had nothing but big blocks the last 15 years so I am a little rusty on smallblocks...LOL Thanks,Jim