Honestly, I can't remember. I just found a tap that seemed to be a size larger than the holes and predrilled then tapped it. I bet if you do a search you can find some info on the subject. I think that there was a long discussion about it on 1stgen.org. Might try there. Sorry I'm not more help!

 

Was it a NPT tap, or just a regular for example 1/4-20 tap. Thats probably too big, but just a straight thread?

 

Don't remember exactly what thread it was in - but I read where several that have tapped the holes are using 1/4-20 screw ....

 

I have no problem at all with the ball bearings, 4 pound drilling hammer and a punch.

 

You can make the pin longer just grind a flat spot on the back side of fuel pin install it & turn it to where you want it works for me

 

Wrong pin thread. This is referring to the afc guide pin, not the eccentric cone/pin.

BTW, don't use a cheap drill bit to build your longer guide pin. I did at first, the fuel cone was harder and I ended up with metal shavings inside the afc bore. It didn't even make a mark on the cone. Ended up getting lucky with an industrial VE pump I had laying around, it had a longer guide pin to begin with. I used it.

 

gotta bring this to the top.

there seem to be a lot of you guys out there that are running an aftermarket fuel pin (M&H or Denny T II) and have noticed fuel leaking from the vent tube. from what i can understand, most people have come to the conclusion that the fuel pins have a deep enough cut that allow the AFC pin to travel far enough and let fuel leak past the o-ring that surrounds it. however, in my findings when i replaced that tiny o-ring, that AFC pin could be pushed to the back of the bore that the fuel pin resides in and i could not see daylight around the o-ring, nor did the pin fall out of it's resting place. now that doesn't necessarily mean fuel can't leak past the o-ring still. i replaced that o-ring back in december, installed an m3 fuel pin about 2 weeks ago and just 2 nights ago noticed that the same fuel leak was back. so my question to this and for all of those using aftermarket fuel pins, could the idea of making a slightly longer AFC pin remedy the fuel leak? or could the longer pin cause something to bind within the pump if the AFC foot is not ground?

 

yes iam aware of this just used the wrong words explaining