jja Posted February 17, 2022 Share Posted February 17, 2022 Recently been updating my engine bay back to original. Was wondering whether anyone else with a 1970 MC (with 4bbl rochestor carb) has the throttle return spring attached? I'm assuming this is the name of the spring (green?) that is supposed to be attached to the small hole of the thermostat housing and attached somewhere else on the carburetor? Appreciate any help on this topic, including pictures. Quote Link to comment Share on other sites More sharing options...
stangeba Posted February 17, 2022 Share Posted February 17, 2022 Here is my 71 350. I added cruise control and removed the TCS system. Quote Link to comment Share on other sites More sharing options...
stangeba Posted February 17, 2022 Share Posted February 17, 2022 This is the information I received when I had my Qudrajet prebuilt a few years 😁 ago.. My primary shaft was very loose so they replaced the bushings. No spring info but may be of some help to someone someday. (click on the link) https://wordpress.com/page/1971montecarlo.wordpress.com/1233 Quote Link to comment Share on other sites More sharing options...
Dtret Posted February 17, 2022 Share Posted February 17, 2022 I think this will help. Assembly manual (small block)and a picture of mine(1971 big block) 1 Quote Link to comment Share on other sites More sharing options...
jja Posted February 19, 2022 Author Share Posted February 19, 2022 Thank you everyone. So what is supposed to be attached to the hole in the thermostat housing? My 70 MC came with cruise control from the factory. Quote Link to comment Share on other sites More sharing options...
Dtret Posted February 19, 2022 Share Posted February 19, 2022 Possibly nothing. The t-stat housing was used for many different applications so your car may not have a use for it. It is not used on my 71. Hopefully someone else will chime in with a better answer. 2 Quote Link to comment Share on other sites More sharing options...
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