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I'm a grown up drunk!
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Discussion Starter · #1 ·
Had the Nova just over 10 years now,
it came with a powerglide then changed a few years back to a th350 which i much preferred,

but ever since i've owned it the plan was to fit a 4speed muncie,

been collecting all the various parts over the last year or so,
so with a bit of time between projects and extra garage space i've finally started the change over:tup:

chose to go with the wide ratio m20(and a spare m20 for when i blow up the first one:D)
which has the lower 1st gear to suit the 3.08 rear currently in there,

lots of stuff for early Nova's is Nova specific,
bought an early nova ali bellhousing with the 7 o'clock fork position,
nothing wrong with the bellhousing but boy was it thin so got cold feet and as i like my feet sold it on and bought a steel lakewood bellhousing, once again nova specific.



out with the th350 and trial fit the muncie,
no clearance problems thankfully as these cars came with muncie's,

 

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I'm a grown up drunk!
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2,657 Posts
Discussion Starter · #3 ·
With the trans in place time to fit the trans crossmember,
only 1 minor problem,
as there is a 1/8" thick steel block saver plate between the bellhousing and the engine everything is now 1/8" further back so some filing needed to get the trans mount bolts to line up,

last look inside the car with the old auto setup,



not for long, all out leaving the auto hump for the original floor shift,



time to hack out the tunnel,
luckily a preformed steel weld in hump is available,



it looks huge until the hump is offered up, with the Hurst competition plus shifter for a quick fix:tup:

 

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that will be a bit of fun gary ,do miss the stick in the demon ,but alot quicker with the auto,have you got a good clutch
 

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I'm a grown up drunk!
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2,657 Posts
Discussion Starter · #5 · (Edited)
Time to weld the hump in,
was going to stitch weld it and run seam sealer around but got carried away and fully seam welded it with the forgiving Tig bronze rods,
still left some large gaps from where the auto hump was hacked out so these needed panels forming and welding in place.





a good key up of the floor and a good dose of red oxide to protect it,
in this pic you can see the new brake and clutch pedals in place which were a simple bolt in,
i must add that Fred fitted them along with general help along the way:tup:

 

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I'm a grown up drunk!
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2,657 Posts
Discussion Starter · #6 ·
that will be a bit of fun gary ,do miss the stick in the demon ,but alot quicker with the auto,have you got a good clutch
More fun is the main reason Tel,
think i've got the right clutch more on that later.
 

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fat rotbox rodder
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5,805 Posts
must admit i sometimes miss the manual in the 100, manual v8 cars =great fun and an even bigger grin factor:tup:
 

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I'm a grown up drunk!
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2,657 Posts
Discussion Starter · #9 ·
Trans out and on the bench for setting up,
the hurst shifter installation kit is vehicle specific not trans specific so the 3 shifter arms supplied are for the stud/nut fixing type found a 66 era trans,
as i'm using a later muncie which has bolt-on arms 3x 68-on arms were ordered,
the 1-2 arm & 3-4 arms were good but the reverse arm was completely wrong so half of each arm was welded together to make the correct arm,
not sure if it needs it but fitted a spring to hold the reverse arm forward,



the shifter requires two original muncie spacer tubes to mount to the tail housing which of course i didn't have,
so once again improved on the original as this is a high stress area made a new mounting bracket with two tubes and gussets to now mount on 4 bolts instead of the original 2,



while the trans was on the bench i made another bracket to mount a microswitch for reversing lights triggered from the back of the reverse lever,
reverse light wiring is already in the car from the original shifter,

 

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I'm a grown up drunk!
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2,657 Posts
Discussion Starter · #10 ·
must admit i sometimes miss the manual in the 100, manual v8 cars =great fun and an even bigger grin factor:tup:
5 speed wasn't it?

remember it with the manual being very loose at north weald on more than one occasion:D
 

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I'm a grown up drunk!
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2,657 Posts
Discussion Starter · #12 ·
Time for clutch linkage,
went with mechanical as it's all available in reproduction,
similar to early camaro with pushrod which links to a z bar with ball joints each end,
a chassis bracket below the steering box,
and an adaptor bracket to mount the other end low down near the pan rail of the block,
you guessed it there was even a 'nova only' 283 & 327 made from 64-67 that had another threaded hole in the block for the clutch ball,

this is the bracket that mounts the ball just in front of the filter housing,


after major struggling there is now a z bar wouldn't mount to the balls in it's original form,
so heres the finished bar after cutting it in half, 1/2" removed from the centre, sleeved and welded and cutting a vee into one of the bends then re-welding,


and bolted in place,
 

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I'm a grown up drunk!
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2,657 Posts
Discussion Starter · #14 ·
Pushrod from the pedal to the z bar mocked in place,


time to mock up the release arm in the bellhousing,
this required fitting flywheel & clutch,

flywheel is 153 tooth steel centerforce zero balanced for the 86-on s/block in the car now,


chose to also go with a centerforce clutch,
10.4" dual friction street/strip type,
apparently give a light pedal as the bob weights on the cover apply extra clamping pressure as the rpm's rise,


 

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Banjo snapper.
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3,507 Posts
Looks like I'll stand a chance of a ride in it on Sunday then mate? I don't mind helping you bleed the Z bar.
 

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I'm a grown up drunk!
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2,657 Posts
Discussion Starter · #17 ·
Now the release arm,
i've 2 early nova release arms, one from a nova specialist, one from a muncie specialist,
both different, different lengths and at different angles:beuj:





tried them both but they either fouled the clutch can by being too short or the lower pushrod didn't meet the arm due the bend,
so plan b, fit a camaro type cranked longer arm,
with a bit of minor trimming on the pushrod, aal good:tup:





with the lower pushrod in place,


with everything in place, tried the clutch, pedal initially feels no worse than a daily:happy:
 

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Looks good gary as always.:smoke:
 

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I'm a grown up drunk!
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2,657 Posts
Discussion Starter · #20 ·
After trying everything multiple times,
decided to add a bit of adjustability in the clutch,

it's all only been tested without the motor running and cold, and due to the release arm being slightly longer and slowing the clutch ratio,
added another adjustment hole to the lower link in the z bar to speed up the ratio if needed?




due to the longer release arm a bit of header massaging was needed,
 
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