I have heard the epoxy many choose to use for the process of filling the intake ports is Devcon. They sell numerous types and I was trying to find the most appropriate. I contacted them and they suggested the Plastic Steel Putty for up to 250 degrees F and the Titanium putty for up to 350 degrees F.
Do you think the Plastic Steel putty would suffice? I already have a 1lb container and would like to use it if possible. I'm hoping the epoxy wouldn't see over 250 degrees since the coolant will be circulating through the housings.

 

Anyone???