Pac 1215 or 1218
 

Ok just picked up a new pre-owned cam. Specs are 218/222 112+4 with. 587 lift. Need to decide on springs. Have read the spring rate on 1215 and 1218 are the same but 12q5 has lower opening pressure. Seeing as this is going in a sub 6k rpm Yukon, the 1215s would be better suited?

1219s are good too

Its a Cam Motion custom grind. So I asked them the same question and they said they'd "like to me in in a Cam Motion .625. Looks the same as the 1219s. Question is why go higher lift and spring rate and pressure for a daily driver?

better high rpm valve control

I see 5800 rpm once every 2 weeks if that, lol. Don't need high rpm valve control at low to mid rpm.

Sounds like your mind has been made up for a while then. Buy the cheapest set you can find

Minds not made up just looking for someone with knowledge to give share some.

I must be one of the few people that ruined my engine because of a broken single coil valve spring . I'm sure it was just bad luck.