Looking for the correct spec's to rebuild a 1970 W-30 carb with automatic. Jet and metering rod sizes and anything else i need to know ---thanks---Greg

 

i believe you need the au secondary meetering rods for that carb .there will be guys on here that are experts on this subject .there is also some great carb info at 442.com you might find interesting .i will follow along as i plan on doing some changes on my quadra jet for my 455

 

The "258" carb had 69 primary jets & 52C rods & yes the secondary rods were the AUs

 

Where can i find a source for the 52c rods. Also i saw a source that stated the jet size was 70 on the 258 carb. Thanks Greg

 

The 52C primary rod is a triple taper rod that was only used in Oldsmobile for 1970, and I believe was only W-30 models. So, good luck.

 

FYKI... triple taper 52C rods & 70 jets & AU sec. came in Toro #252 carbs too.