427 tall deck combos questions

Can anyone elaborate on these combos for me


a- 454 standard crank with 6.535 rods 454 standard pistons with ch of 1.645 gives me a minus deck clearance more or less -0.02, instead of decking it below zero can i just get a slight dome on the piston to make up the difference and at the same time adjust the compression? that way i don't have to readjust everything else.

b- 454 standard crank with 6.385 rods 427 standard pistons same thing here i get a -0.05 deck clearance can i get a domed piston to make up the neg. deck difference and adjust the compression?

c- 427 standard crank with 6.535 rods 427 standard pistons. again here if i use 1.765 ch pistons i get a neg of -0.02 can i dome here also.

d- 427 standard crank with 6.535 rods 454 standard pistons with 1.645 ch pistons neg deck height again but a tad to much at -0.14. can i dome there or do i have to deck the block -0.10 and make up the difference with the dome and if i deck it at -0.10 how much do i really have to adjust everything else.

how far`below the deck can one go safely without creating a situation were the compression ratio is just way to low. or can like mentioned earlier used domed pistons to make up for the compression lost?

I have aluminum merlin heads i got from a friend who owned me cash for remodeling work i did for him. they have 119cc chambers, rectangle port runners large valves

and are their any combos with a 4.250 cranks were i can use standard pistons or do i have to get custom ones  

Hey friend, my advice would be to make a free call to a local machinist and they can help you settle your issues the best, and give you plenty of options on what it is you can really do with that tall deck.  I personally have a 427 tall deck that I stroked to a 496 with a 60 over bore and a 4.25 crank and rotating assembly from eagle with 6.8 rods. I really hope that helps.