Armen wrote on 06/19/17 at 18:25:26:I bought some high temp epoxy that was designed for exhaust ports, but haven't tried it yet.
I cut a head in half to get a better idea of the wall thicknesses and the amount of metal between the spring seat and the port ceiling.
I've got some disposable spares I can cut and take a look. Meant to do that before but just never got around to it.
Yep, there is not much metal to play with.