Ok, my LD340 intake is flat- no recess for the thermostat. My new o-ring water neck is also flat- no recess. Do I have to buy a new waterneck or should it seal ok? I'm using a stock thermostat. Anyone with any experience on these?
If you want to get a good one try this one. I bought this exact one and it is nice and heavy with a 1/2 inch thick flange. It also has the groove cut in it for the t-stat. Contact CudaCHick1968, she has mine so she can powder coat it. Here are a few actual pics of the one I got. For $11.50 you really can't go wrong. It doesn't have an o-ring but I think it might be hard to find an o-ring one with a groove for the t-stat.
