Build suggestions for 340?

Several years ago I bought an all original 73 340 Duster. The motor and transmission were tired so I rebuilt both. I had 2.02" valves installed in the heads, did a little clean up work, blended the bowls and port matched the heads and intake. The bores were good so I used a set of early 340 higher compression pistons that I had on hand. For the cam I used a MP 280/.474 hydraulic. It had the original intake, exhaust manifolds and factory convert with 3.55 gears. I was surprised how hard it ran, the cam had a little thump and was about the limit for a stock converter.