Valve guide seals LA 318 ?

The cam that's in it is an old crane fireball was thinking the springs could be crane also if he used a kit. I had this same set up in a 318 back in the 80s ran good. Found it funny the only difference between the two engines is the double valve springs. So yes I could use the single spring. My first 318 had totally stock heads just a valve job. With the same cam. I can't remember the lift or duration and having trouble finding the specs on the web