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  1. davisw73

    20% + increase in fuel mileage!

    I think the combo of both helped you out equally and it doesn't sound far fetched. I had much the same results. Mine had a TH400 w/4.56 rear end and stepped it down to 3.42. That increased me from 13mpg screaming at 55mph to 15mpg screaming at 70mph, lol. When I could keep the mph down to 55...
  2. davisw73

    The clutch is here, 4500 conversion done by New Years. You hear that @frankenchevy?

    I just got done doing this swap and had the same issue. So I cut it a chunk out of it, welded a coupling nut on one end and threaded the other end so I could adjust the length perfect. Put a jam nut on it and it worked amazing.
  3. davisw73

    Clutch master cylinder volume

    So here's my dilemma. I have an 85 C20 that I am converting from TH400 to NV4500. I have stock 85 hydro master cylinder and 99 NV4500 internal slave. I have everything mounted, ready to go and it seems the square body master doesn't seem to push enough volume to completely disengage the...
  4. davisw73

    Hydraulic clutch masters and slaves

    I am having this same problem right now. I have an 85 C20 with NV4500. The master is stock 87 and the trans is a 99 with internal slave. The square body master doesn't seem to have enough volume to completely release the clutch. I can see it pushing the throw-out bearing and I can even get a...
  5. davisw73

    upgrading your square with a hydraulic clutch

    Just starting to convert my th400 to NV4500. I have a hydro boost pedal setup and was wondering if it has a pedal return spring like the mechanical setup or does the spring on the internal slave cylinder force the fluid backwards and push the pedal back? I can't seem to find a part listing or...

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