Quadrajet ID.

[John Scott]

Originally Posted by Bob Don

This site says carb is from a 74-77 truck:

http://www.carburetion.com/CarbNumbe...umber=17054930

I saw that as well. However, that same website says 1705 is 1976-1979.

I also found this on another website:

Rochester-built Quadrajets have numbers starting with '70' or '170'. Carter built carbs have a 4 digit number. Quadrajets used by other manufacturers were sometimes assigned their own number, which appeared on a tag screwed to the front of the airhorn.

• 7026200 - 7029285
• 7040200 - 7041544
• 7042202 - 7043507
• 7044201 - 7045589
• 17056200 - 17058588
• 17059061 - 17059588
• 17080201 - 17082526
• 17083204 - 17085598
• 17086003 - 17088152
• Carter QJet numbers and Ford numbers
• California (A.I.R.) 4MV numbers: 7031421-7037276
• Service replacement numbers: 7046576 - 7047557
• Service replacement numbers: 17050507 - 17055888
• Service replacement numbers: 17065121 - 17079915
• Service replacement numbers: 17110082 - 1711199

The way I read that is that any "1705" number smaller than 17056200 is a service replacement carburetor.