340 Build advice needed!

I currently have a 340 block 60 over and standard 3.31 stroke with j heads, I tore it down and the cylinders look brand new with the cross hatch still in them and normal pistons, i'd like to not touch the bottom end if at all possible. What i need advice on is choosing a cam or cam kit, I was looking at a comp cam complete package with cam lifters springs and timing chain set, what would be my best cam option for a streetable 4-speed duster. I also plan on using a Torker 340 intake and a holley 650 dp possibly headers and mild port work