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  1. mackthehack

    Drain line off of 475?

    Going to run the twins for a little bit. While getting the 472 rebuilt, then run that. I know I have read until my eyes bleed on comparing a big single to twins. Just want to do my own comparison between the two setups with the way my truck is setup and how I drive.
  2. mackthehack

    Drain line off of 475?

    Nope, leave it in place. Going to put grease on the bits and tap. Go real slow and have a shop vac running to reduce to possiblity of shavings being left in the engine.
  3. mackthehack

    Drain line off of 475?

    thanks man
  4. mackthehack

    Drain line off of 475?

    Thanks for the info and tips guys. I will look around online for a tap that size. And I will practice before I commit to drilling on my valve cover. Operator1. Do you have pictures of where you went on the v/c?
  5. mackthehack

    Drain line off of 475?

    I know I am probably confusing everyone and myself. Just rechecked the adapter package. It says -10 to 3/8. I double checked the fitting to my 9/16 tap. The tap is way too small. I measured the end of the fitting which is supposed to be 3/8 NPT. It measures out a just under 5/8 diameter. Maybe...
  6. mackthehack

    Drain line off of 475?

    Thank you gents...
  7. mackthehack

    Drain line off of 475?

    Thought about going into the pan, but don't want to worry about messing up. And pulling the pan. For the bit. I wasn't sure. Because of how the fitting is labeled for the size. Then I checked drill bit sizes and it's about the size of 5/8. Checked the threads they are fine pitch. Standard size...
  8. mackthehack

    Drain line off of 475?

    Trying to tap the valve cover. Maybe I have it wrong. I don't recall which one was the tap and which one was the die. I wan to drill and thread the valve cover. Yeah, the fitting is a -10 to 3/8 adapter. (What its labeled)
  9. mackthehack

    Drain line off of 475?

    I Have most of my parts to do my 475 over stock. For my drain line, I'm going to the valve cover. I have -10AN drain line with fittings. One fitting goes from -10AN to a 3/8 NPT. I have looked all over to find the correct size drill bit and tap. It seemed that a 5/8 drill bit will work. But not...
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