That's quite a Wall of Text. I'm guessing this doesn't run under strict.

Anyway, I wrote this just for fun:

use strict;
use warnings;
use 5.010;

my $m8 = m8_text();

eval "no strict;sub { $m8 }"; die $@ if $@;

for ($m8) {
    s{(\@|\$\#)(?!M8PinContentSorted)(\w*M8\w+)}{${1}{\$M->{$2}}}g;
    s{\$(?!M8PinContentSorted)(\w*M8\w+)\[}{\${\$M->{$1}}\[}g;
    s{(?<!foreach )\$(?!M8PinContentSorted)(\w*M8\w+)}{\$M->{$1}}g;
}

eval "no strict;sub { $m8 }"; die $@ if $@;

say $m8;
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The m8_text() sub returns the text from your node verbatim. I do a few replacements on it, and I confirm before and after that it compiles with eval.

So you can paste the results into a sub like this:

sub node_803848 {
    my ( $M, $name ) = @_;

    # wall of text
}
[download]

Call the sub like node_803848( $big_m{$name}, $name ) with $name set to "M8", for example.

At that point, you need %big_m to have a hash ref for each of your M1–M8, and each of those hashes has an entry for each *M8* variable in the original. There appear to be no hashes in there, so it's all scalars and arrays that you could initialize like so:

my %big_m;

$big_m{M8}{M8TrackSummary} = [];  # array ref
$big_m{M8}{M8CurrentTrackLoc} = undef;
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Of course, I haven't tried to run this, but if it works, the result could run under strict with a few more changes. Each use of foreach needs a my. There are places where "M8" appears in string literals, and that needs to be $name.

If I had this in front of me, I'd be strongly tempted to rewrite it all, but I don't have time for that here and now. Instead, I wrote the cheap and evil solution you see above. I don't actually recommend it, but it might get you started.

Good luck.