SPArKy_Dave 8,831 Posted April 4, 2020 TMeyer Track Boss thermostats are the best on the market atm, for 302/351C, plus 351M/400 engines. Might be cheaper to purchase direct from TMeyer themselves, if you can wait for shipping. https://www.custommustangs.com.au/correct-cleveland-style-thermostat-180-degree-302c https://www.ebay.com.au/itm/Track-Boss-351-Thermostat-351c-Cleveland-Mustang-1970-1971-1972-1973-Mach-1-Ford/283549738162?hash=item4204e1a4b2:g:NXgAAOSwgD9cnEyS Dayco DT66A is similar, but apparently crap quality now. They used to be supplied from the same mob who make the TrackBoss/Robert Shaw ones - Caltherm in the USA (previously called Robert Shaw Controls, then Cooper Standard Automotive) http://caltherm.herodev.com/thermostatic-solutions/balanced-flow.php Here's some other part numbers for Cleveland specific thermostats - Stant 180 29468 Cleveland specific; this is the one I used Stant 192 29469 Cleveland specific Stant 180 13468 Cleveland specific Stant 192 13469 Cleveland specific Stant 192 S-346-192 Gates 180 33128 Cleveland specific Gates 192 33129 Cleveland specific RobertShaw 180 333-180 Cleveland specific Ford/Motorcraft 180 RT-310 Cleveland specific Ford/Motorcraft 192 RT-139 Cleveland specific; 70-73 351C,351CJ, & Boss 351 Ford 180 D7PZ-8575-A Cleveland specific Napa 180 197 Cleveland specific 1 gerg reacted to this Share this post Link to post Share on other sites
gregaust 316 Posted April 5, 2020 Near on 100 bucks for a thermostat ? There's been so much talk of Clevo specific thermostats like these of late . For many years no one bothered or even heard of this and didn't have issues .. Sure seems like a social media following to fix other issues ????? Opening up for discussion 2 bear351c and SPArKy_Dave reacted to this Share this post Link to post Share on other sites
SPArKy_Dave 8,831 Posted April 5, 2020 Go direct to the TMeyer website, and the Made in USA Track Boss thermostats are $32.00 USD. The current crappy exchange rate, is probably bumping up the local prices? $100 is still cheap insurance against engine damage, IMO. 1 gregaust reacted to this Share this post Link to post Share on other sites
bear351c 10,260 Posted April 7, 2020 Yeah, I've run both the DT66 and the current 351 has a TMeyer jobby, no real difference. The DT66a ran fine with an XF 6cyl radiator, the TMeyer is running cool with a standard XB 3 core. Both with standard fan and spacer with shroud. 1 SPArKy_Dave reacted to this Share this post Link to post Share on other sites