Happpy new year
since you have to make stands figure out what the best spring to use - usually taller like 2" or Big- block size ( or BBC size) some height where you have choices and less pricy
then get the valves and retainers to match'
you should be able to get more spring clerance
also the taller spring requires the shaft to be set back and thus the adjuster and thus the pushrod giving you more pushrod clerance
