i got a 427 tall deck. i got a 427 standard forged crank and i also have a BBC forged crank with a 4.250 stroke. what options do i have for each crank. length of rod for each and type of piston compression height for each crank. Bearing in mind of course that i don't have the funds especially custom pistons so i would like to either use 454 or 427 pistons with their stock compression heights. What are my combo options and choices?