Here's the story, '82 Silverado with a crate 350 and a Quadrajet. My temperature gauge says at idle and low speeds that I'm running at about the 210 mark. If I pull it out on the highway It'll jump up to 245. As soon as I get down to slow speeds we're around 210 again. The thermostat seems to be fine. It warms up in reasonable time, the heater works great, and after running a while under the hood feels pretty cool (actually its probably the coolest feeling F/S GM we've owned). The sender that is currently on there has the button type end which came on the 73-78 motors. The one I bought at the parts store has the prong end which according to LMC looks to be approiate for the vintage. Maybe the older sender is the culprit. Whoever did the engine swap used an older engine to complete the crate motor, my intake manifold is the older style. The wire going to the sender has a splice in it but the connectoin is tight and complete. When I was changing the bulbs I also changed the gauge in the instrument panel it does the exact same thing. I want to make sure I'm on the right path before I put it in. I don't wanna be out my $20. Nature also decided to throw more snow over here so I can't even work on it. Thanks for the help June 2001 - The Texas Sawz All masacre begins. Be afraid rust, be very afraid.