Available parts big block winter build.

Hi

I just had an idea looking around at parts that I collected over time, that it could be good to plan some winter time project so here it goes..

What I have is:
- 400 block that is bored .030" over and will clean up at .040"
- Forged flat top pistons (dont remember the brand but good) 4.375 with scratches on skirts and some slight marks from valves touching.
- LY rods with ARP bolts
- 440 forged crank with mains for 400 block.
-used solid flat tappet cam with .650" lift and some decent duration.
- used lifters that worked with this cam
- used nice condition timing set (Crane I think)
- Mopar performance adjustable rockers (they look like crane gold but are blue and have Mopar logos on them
- 440 source ported heads (one seat was replaced after failure)
- Edelbrock victor intake
- 950 cfm holley double pumper

I was thinking to build 650ish + hp engine using all that should be easy.
Wanted to test line 2 line coating very much and these pistons seem like a perfect choice for ceramic coating. They can grow them to the bore size I end up with...
LY rods can be controversial idea, but pistons I have are much lighter than stock and it would be street setup that wont see more than 6500rpm, should I use them or upgrade?

What would you replace? Where should I spend some money not to make this experiment a stupid idea? Should I get aftermarket caps and put griddle? Get some new rods?

Thanks in advance for all the feedback!