New oil pressure switch doesn’t fit...318 LA

Once the sealer/locker is set, then do this for a test: Pull up hard and steady on the adapter a sender with 25-30 lbs force and hold it as long as you can; wiggle it when holding with this force. The actual force exerted on the adapter is gonna be about 15-20 lbs peak with max oil pressure.

If you do the JB Weld around the adapter, then I would suggest:

• Leave the adapter and sealer/locker in the hole as-is
  
• Cut out the present sealer/locker that is above the block; this is so that there will be no chemical reaction between the sealer/locker and the JB epoxy
• Put a thin line of paint just at the edge of the remaining sealer/ locker at the base of the dapter, to help seal it off from the JB Weld
• Scrape paint all around for about 1/2"
• Clean adapter and block with alcohol
  
• Apply a generous amount of JB Weld, reaching up well on the sides of the adpater