I am planning to build a 400 block into a 500 inch stroker and would like to get some opinions or ideas from some other.

Mopar 400 block will clean up ar 4.375 bore aluminum main caps and 1/2 to 3/4 fill
Shooting for 13-13.5 comp ratio
I already have an eagle 4.15 crank
6.65 aluminum rods 2.375 big end and standard 1.094 pin size
I believe piston comes out to 1.23 comp height in a low deck will have pistons cut to work with heads/ compression ratio
Indy 400-2 intake with spacer
E-85 1050 dominator
magnafuel 500 pump
cometic MLS head gaskets?
Ati damper?

All of those parts I already have or will have. So I basically need heads rockers and cam setup.
I am thinking of just buying nice heads the first time.
Full port indy -1s probably 75cc
Would it be worth it to go to the large 2.25 intake valve? How much does it cost on average?
custom headers
T&D rockers 1.5 or 1.6 depending on cam
Solid roller cam maybe low to mid 700 lift duration? either the comp .705 roller or maybe get a cam cut
Shooting for about 800 on motor

1 kit on the fogger full 300
or 150 on a fogger and 150 on a plate depending on what the car hooks best with.

Car will be all steel dart glass bumpers and hemi scoop. Mini tub caltrac car on maybe some 29.5x13.5 or what will fit. built 727 and ford nine inch 3.90 or 4.10 gear

Any opinions are welcome or ideas of what you would do.

Cody