It would be in your best interest to buy the kit.
Even if your motor was rebuilt not long ago. If the head was only freshened up. and New spring were not installed at the time of the rebuild.
They could have way to many miles on them,to Live up to a New cam with more lift. The springs could very well brake. I know Been there done that once a long time ago.I put a Rv style crane cam in On a rebuilt/( just freshened up head. NOT thinking about the HIGH miles on the springs and one day on the way home Surprize one broke.Lucky for me
nothing fell into the motor and i made it home.
God doesn't like ugly.
