I posted on FM too, but here is my technique, they usually are reusable for a long time
- Make sure your v/c are flat at the bolt holes
- Any name brand gasket
- 3M weatherstrip adhesive on V/C and gasket, after it dries, attach glue to glue
- Check intake gaskets, if they stick up above v/c rail, trim with Roloc disk on angle grinder, or use Dremel, etc.
- Tiny dollop of RTV at intake/head seam in case of slight differences in rail height
- Tighten all 5 evenly, use spreader bars on lower bolts if the valve covers are flimsy
Each time you pull them, wipe off the little bit of RTV on the head, and replace the RTV with another fresh smear, they last forever