Jeff's 70 Ranchero 500

Discussion in 'The Stable' started by Jeff B, Dec 8, 2014.

  1. Jeff B

    Jeff B In Overdrive BRONZE MEMBER

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    1125171633.jpg

    Finally had some time to work on the Ranchero. Needed to get the seats out of the way so they were first up. I was ready to make mounts or brackets, but the Milan buckets went in using their stock brackets. It took some time to fit them and I had to massage the brackets and drill new holes in the floor but it worked out. Nice and comfy too. Now I need to run a hot for the 6 way motors and see if I can figure out if they have heat. Pretty happy with the result.
     
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  2. FordR500GT

    FordR500GT In Overdrive

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    Impressive
     
  3. Jeff B

    Jeff B In Overdrive BRONZE MEMBER

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    For my next project, I am going to (try to) add a supercharger to my Ranchero. Last summer I found a used Paxton supercharger setup from an early Fox body Mustang. Uses the Paxton SN89 blower and included most of the parts and brackets to get me started. My truck has a very stock 302 2 barrel motor that runs good. A while ago, I started collecting the balance of the parts needed. I will do this write up in pieces as I complete steps so it may take a little while until all is done and since I am adapting these parts to my '70, there may be some bumps along the way. What could possibly go wrong?
    The first step for me was to install the crankshaft or drive pulley to the harmonic balancer. I had to fit the blower pulley into the factory pulley.
    One “nests” inside the other. I removed the pulley bolts and put the blower pulley in place and it does not fit. There is a projection on the base of the blower pulley that fits inside the balancer/crankshaft and it was too big by about 4 hairs. I called my son Joe and asked if I could use his lathe, took some measurements and took my parts over to his place.
    Joe just happens to have a '65 Ranchero with a 289 running a Paxton blower. That little truck runs pretty darned good. We set up the lathe and in about 15 minutes I had removed enough material to get the pulley to fit. Back in the car and made a stop at OSH for some bolts and other hardware.

    This is the result.
    0128181800.jpg

    The blower pulley was spot on. No wobble or anything. The stock pulley is wobbling a bit, poor old thing is a victim of mass production but it should be OK.
    The part that we turned down could not have fit any better. Any bigger and I would have to put it in the freezer to get it to fit.
    OSH had only 3 bolts at the right length so I bought the next size up and it worked out better as they had a longer shoulder
    on them where they pass thru the blower pulley. Trimmed off about 3/8” on each of them and it went together fine.
    The fan and shroud will not fit right now, so I will have to dig into that soon. I have a electric fan and shroud from a Crown Vic so I will see
    if that will work. Putting the 2 pulleys in place was a bit of a comedy as I don’t have 3 hands. A little blue LocTite and all snugged up.
    So the next step will be to fit the bracket that holds the blower and move the alternator into its new spot. Same side, just will sit below the blower.
    I have 2 belts on for now (no AC belt yet) but no fan or shroud yet.
     
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  4. Jeff B

    Jeff B In Overdrive BRONZE MEMBER

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    Had some time today, so I started to set up the bracket for the blower.
    SN89 test fit 630.jpg

    This was a very good thing to do to further understand how the blower installs and works. Today I pulled off the alternator and its brackets and started to fit up the blower bracket. Seems I will have to fiddle with a handful of things for the mounting.
    1)Dip stick did not fit. I did some tweaking and removed the tab that secures it to the head. It fits now but I will have to fashion a bracket somehow.
    2)Top rad hose needs to be real different to clear the bracket and the blower belt.
    3)Pushed the battery all the way forward in its tray.
    4)With the blower in place, the discharge port is aimed right at the shock tower. I will have to re-clock
    the case to get the discharge more toward the valve cover.
    5)Need to find an air filter. Didn't have time to look, but was wondering if I had enough room in front of the
    shock tower to cut a hole for a 3" tube to place the air intake outside of the engine compartment.
    6)The alternator has moved down below the blower. Have to find an adjuster bracket thing that will work and figure out a new belt size.
    7) Relieved to see that the blower and alternator upper and lower pulleys seem to line up. Might have to shim the alternator a bit, but all is pretty close. Big bonus is the AC belt does not get touched.
    A new AC compressor is in my future.
    8)Need to see if the electric fan I have will fit. I have removed the original fan and extension and replaced the bolts.
    9)It is very crowded near the thermostat housing. Looks like the by pass hose was poorly installed, has a kink started. The heater hose needs to be a little longer to clear the blower bracket but wants to kink if I add length. Might try to tweak the metal tube to raise it a bit.
     
  5. handy_andy_cv64

    handy_andy_cv64 In Maximum Overdrive SILVER MEMBER

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    2) Try an 87-91 302/351W truck hose. I'll get a pic if I can remember to do so, but it has a big jog to the inside to clear the alternator/tensioner bracket and serp belt. It has a good chance of solving that issue.
    9) There are metal coil outer pieces you can buy that prevent a kink. They just slip over the outside of the heater hose.
     
  6. Jeff B

    Jeff B In Overdrive BRONZE MEMBER

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    Andy,
    Had a look at an 1986 big Bronco upper rad hose and in the book it looks close. As luck would have it, there is also a 1986 big Bronco in storage at work with a 302 in it and that hose
    has potential as well. Good starting point, thanks.
     
  7. handy_andy_cv64

    handy_andy_cv64 In Maximum Overdrive SILVER MEMBER

    Messages:
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