340 Street Build

The parts you have so far look good to me.
Very similar to my 340 that runs on 91
Since you have adjustable rockers I would go with a Solid Flat tappet Cam.
Just too many issues with Hydraulic lifters these days.
Solids will almost always make more power and rarely need adjustment.
Really no down side IMO
keep in mind when comparing Solid to Hydraulic cams, a Solid will have about 8-10 degrees more duration @.050
(To account for lash)
So around 238-240 to be close to that Comp. 230 your looking at.
Talk with a Cam company like Bullet or Howard's for their recommendation.
Have Fun with your project!!