Proposed 400 bb build, cam recommendations

Used 30 over forged Pistons , want to get around 9.5 : compression

Reworked LY rods

Edelbrock medium rise dual quad intake
with Carter Competition Series 500 cfm

Cleaned up Port matched 452 heads
Remanufactured 383 forged crank

727 tranny 3500 converter
With reverse manual body

3.91 742 case sure grip

Now the car is set up with 24.5 tires and the 3.91, with ten percent converter slippage should cross the line at 6400

And of course a 200 shot of nitrous

I'm looking at hydraulic flat tappets ....

Don't want a rough idle

Your take ??
If building fresh today, I would definitely invest the $$ and go with a solid lifter setup. Options today are so much better than what was available way back!