You need one for an 82 or 83 if the transducer is on the fenderwell. Also, for whatever reason as I've never researched it, the 83 H/O has a different part number servo than the non-H/O 307 according to the parts book. NON-H/O p/n is 25074420 if you can find one. If you have an 83 H/O, the B and C bodies in 82-83 with OD transmissions use the same servo. P/N 25031316. IF you can find one.
84-up went to electronic cruise control. No cable-driven transducer separate, it's a solenoid setup on the back of the servo itself. A bit more compact system compared to the older speedo driven style. Can't mix and match the two systems.
If yours is the electronic 84-up version, the servo is p/n 25074629. The old parts book showed where you bought the servo, bracket, and rod as an assembly. No longer, though. They got separated like conjoined twins somewhere along the way. Cruise rod is p/n 22538135. You're right though, all the 84-up 307 applications use the same rod and servo assembly.
Found an ACDelco 84-up servo. Good price too. $50 obo. These listed for over $200 when available from GM.
Find many great new & used options and get the best deals for ACDelco 25074629 at the best online prices at eBay! Free shipping for many products!
rover.ebay.com