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my ($data,$taillen) = unpack 'C/aC', $inbuf;
my @recs = (length($data), unpack('C7a6A*',$data), $taillen);

# "X" means "back up one byte"
my @recs = unpack 'C8a6A*XC', $inbuf;
...
my @recs = $inbuf=~m{\A (.) (.)(.)(.)(.)(.)(.)(.)
    (.{6}) (.*) (\1) \z}msxaa or die "didn't match";
$_=ord for @recs[0..7,10];