Valve Spring - Broken problem found

not knowing what your cam is
if you are not pushing the envelope get your springs from Elgin or similar
CRANE does not make springs (and who are they since they moved?)
340 springs should work for most lower lift HFT's
set of new viton stem seals while you are at it
you can do a leak down test or even check the compression on that hole
wait till you get a new higher liift cam that actually requires new springs
and the heads off to do the spring seats and guides
rockers ok- if it aint broke don't fix it
save your money cuz I'd check the timing chain