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**Wrenchbender Ret** · 05-29-2017, 11:43 AM

The Monojet came out in 1968. It worked for the new emission laws. 1976 on back had the Roch. model B. The MJ used on 292 engines did have a larger throat & venturie then the 250. Often they have been changed around as the rebuilders don't separate them.
That vacuum outlet might go to the modulator if it has an automatic trans. The dist vacuum was generally hooked to ported vacuum which has an outlet on the other side.

05-29-2017, 11:43 AM	#12
Wrenchbender Ret Registered User Join Date: Oct 2005 Location: Overland Park, Ks. Posts: 5,190	Re: 66 C10 Carb question? The Monojet came out in 1968. It worked for the new emission laws. 1976 on back had the Roch. model B. The MJ used on 292 engines did have a larger throat & venturie then the 250. Often they have been changed around as the rebuilders don't separate them. That vacuum outlet might go to the modulator if it has an automatic trans. The dist vacuum was generally hooked to ported vacuum which has an outlet on the other side.