any instructions on how to put in overflow tubes ?

Send the carburetors to SISF

D.

I'm guessing you won't like this answer, but seriously, the best way to get proper press-fit overflow tubes is to send your bowls to SISF at Shoodaben Engineering (click this for info).  You don't have to send the carbs if all you want is overflow tubes - just the bowls.  Outbound they'll fit in a $5 flat-rate priority mail box and his price includes very quick turnaround, return shipping, and the job done right.

Lost threads include tales of those that tried various glue-in methods that failed over time.

George R. Young may have found a glue that actually lasts for this application?.  Maybe he'll follow-up with a long-term report on his tube install.

That page was last updated in 2008, and some have since reported epoxy did not cut it. Maybe some epoxys are better than others.

The epoxy I used is still holding strong. I've read this may be better stuff but haven't tried it.
http://www.homehardware.ca/en/cat/index.htm/SEAL-ALL/_/N-1z141pf/Ne-ntc74

Press fit is possible if you have a drill press and a little bit of skill. However, are you sure you can get them 100% correct the first time?  Becaue they have to be right, exactly right for press fit. Send them to Steve and know they're done right. Save the saving money for socks or something.

I personally prefer quality socks.

Send the carburetors to SISF

  Straight up on this.  I live in not so sunny Wisconsin, but we do have the Packers!     I send my float bowls to Steve USPS priority mail on a Monday and had them back either that same Thursday or Friday.  I don't recall which day exactly, it was posted pre-crash on the old forum, but in any event, I dare anyone to beat that as far as service!  Quality of workmanship is also second to none.  If you have to save up for the mod, do it.  $80 for this beats untold numbers for a rebuild or replacement.

I personally prefer quality socks.

Yeah, actually, I guess I do to, now that I think about it. When a person is in boots for 16+ hrs in a row then off and on during the night, quality socks are a must. Socks and wheat bread.  And toilet paper. Anyway..............Pick something else to skimp on.

Yeah, nobody can fix anything, anymore... There are only a few craftsmen left in American.

I could do a press fit in high school.

Yeah, nobody can fix anything, anymore... There are only a few craftsmen left in American.

I could do a press fit in high school.

  Wow Charlie, are you sure that's the tone you want to set when you're coming here asking for advise? Sure, press fits are easy - for you and me. Maybe not everyone else. Plus, now you know you need a press fit. Heck, now you know you need overflow tubes! Seems like you're ahead of the game already, I don't see the point of taking a depracating tone here. Steve

Yeah, nobody can fix anything, anymore... There are only a few craftsmen left in American.

I could do a press fit in high school.

http://web.ncf.ca/ag136/floatDrainTubes.htm

Here you go then. Have at it. 

Also, There is a big difference between being able to press fit something and sending a job to someone that you know has done it hundreds of times and will get it exactly right the first time. I can press fit. But I'm not 100% sure I can getit right on the first try. If you can, good on you.