170 or 225?
My 1963 service manual show only holley carbs used on 225s the bbs was used on 170s
Don't know what kind of book you're looking in, but your info is wrong for 1963 and pretty much most other years, too. My 1963 Dodge factory service manual, and my 1963 factory parts cattledog, gives specific Carter BBS and Holley 1920 carburetor type numbers for every possible combination of 170 vs. 225, Dart/Valiant (w/rod-type throttle linkage) versus bigger cars (w/cable), automatic/manual trans, regular calibration vs. taxi-fleet.
My 1963 factory books also give info on the one-year-only, 225-only, big-car-only carburetor that was neither a Holley 1920 nor a Carter BBS. If you're looking in a complete factory book, you'll see it too. If not…well…I guess you won't!
Anyone with a 66 service manual that can confirm that in 66 They used holleys on 225s?
They did indeed use Holley 1920s on 225s in 1966. Type numbers 3271 through 3282, inclusive, plus some additional types released to fix problems with some of the original '66 carbs. They also used Carter BBSs (type 4173s for 225 taxi/fleet, type 4183s for 225/stick shift, and type 4184s for 225/automatic).
