I'm having problems finding the right retainers and seat cups togo with my pac 1218 springs on stock lt1 heads. I keep hearing the stock retainers etc. Fit but they dont fit flush.
Anyone know which part numbers I need from experience?
Thanks

 

The Pac 1218 is a beehive spring, you can't use the stock retainer. You should be able to use the stock seat and locks with the comp 787-16. Most use the 648 lock.

 

Yes, the Comp 787's with 11/32 valve stems.

 

Thanks guys ill give that a try and ill see if the seat cup fits.

 

The cup didn't fit flush at the bottom of the spring. Anyone have any ideas. The retainers worked great.
Thanks guys

 

Just push together with a little twist.

 

I got it to fit in but there is still a very small gap between the spring and the seat. Is that okay? I thought it should be flush but I'm no expert