Does anyone one know how to decode the model number on the Rochester Q-jets. For example I have a 17083204. I know the 170 denotes the Rochester Company and the 83 is the year. The 2 is rumored to be emissions type whether CA or FE, but I don't know what # corresponds to what. The 0 is GM division? Finally the 4 is engine combination?

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1983 T/A LG4 w/T-tops
Rebuilt/Modified E Q-jet
Custom Dual Ram-Air
Self painted cherry red w/ restored black/grey interior
Welded Comp Eng SFC
Tokico Struts/Shocks
Hotchkis LCAs and Panhard Bar
Energy Suspension bushings all around

Click on the link below, i think youll find what youre looking for.
http://www.oldengine.org/unfaq/leadfoot/qjet1.htm

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1987 TransAm
350 sbc
Holley 750 Vac sec
Edelbrock Performer Rpm Heads/Intake/Cam
Flowtech Ceramic Headers
Crane Roller tip Rockers/pushrods
Flowmaster Muffler

Great job Trnsam87. Thanks, now I know I have a 1983 Rochester built, 49 state emission compliant, 4 bbl Q-jet, manufactured for a Chevy engine with an automatic transmission.

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1983 T/A LG4 w/T-tops
Rebuilt/Modified E Q-jet
Custom Dual Ram-Air
Self painted cherry red w/ restored black/grey interior
Welded Comp Eng SFC
Tokico Struts/Shocks
Hotchkis LCAs and Panhard Bar
Energy Suspension bushings all around