Well we all know the continued story of my Rallye Gauge coolent temp gauge ! Starting with irradic needle movement to nothing at all pinned at "C" even after 1/2 hour driving. I am working from the intake back to the gauge. I am staring wiht possibility of a bad coolent sender unit. The engine is running at a petrfect 185 degrees when warm. The OE part numbers are #12334869, 1513321. Cross reference gives me the number for AC Delco Pro G1852. And BWD TS203. Are these the correct units for my application with a manual ( Needle style NOt lighted gauges. Right now the unit is a BWD TS203. I really would prefer to use the AC Delco unit since that is what would have been in it originally. Thoughts? The engine is the original #'s matching Rocket 350, 4BBL bored 0.60 over Stock Crank, Edelbrock Cam, one step up from stock. Car is A/C optioned with super heat switch. HD Cooling 6 blad fan, 3 row radiator. This was the last video recorded, Next day needle didn't even move with a 15 minute drive.

 

^ Review says it worked on a '71 Cutlass 350 c.i. with gauges. All of your other engine details are irrelevant to the temp sender.

 

Thanks Tom.
This was the unit I was leaning towards. I also reached out to Brian Chiechi who is a well respected Rallye gauge restorer. Waiting to hear back from him too !