Tinnerjohn thank for the info. I have decide so just that and walk away for a couple of days and wait for a warm day and see what that does. As it sits a have suction cups on the inside with a little bit of tension pulling on them with ratchet straps to the seatbelt location.

Told my wife if this does not work I am going to run a beed of adhesive on the inside bottom to the seal and pinch weld. Lol

I got the old truck as a relaxing hobbies but this stupid gasket has me rethinking.

Making new brake lines and put all 4 disc brake was easier then this.