Carb 17058240

[BDHobbs78TA]

I've got a question about this carb. In the bypass idle passages, bottom of throttle body, it has one tiny hole drilled in the passage with the 90

[BDHobbs78TA]

Apparently the entire question did not post. So this is a correction. It has a small hole drilled in the bypass idle passage with the 90 degree turn. It's not in the end, as most are. It is drilled at the 90 instead. Is this going to cause an issue? I had planned on adding bypass idle air, but I'm not sure what this hole is for. I do have a 17058253 that I can use the throttle body from if needed.

[Mudsport96]

I did a quick search on here, and it seems that particular carb is from a turbo Buick. So that may have something to do with it. Here's the link, and hopefully somebody that knows more than me can chime in soon.

https://cliffshighperformance.com/simplemachinesforum/index.php/topic,3172.msg13654.html#msg13654

[BDHobbs78TA]

Yeah....I found it was from a turbo Buick also. I'm guessing that has something to do with the odd placed hole. It also has primary POE, which reading the book isn't necessarily a benefit, but doesn't hurt either. The secondary POE discharge holes are much closer to the flaps than those on the 253 carb also. It doesn't appear that the carb has ever been apart. Planning on rebuilding it as soon soon as I get the myriad of engine parts assembled and ready.