LED Sign from London Bus Stop

[owl_uk]

I found an LED sign from a london bus stop on Ebay.  I thought I would be cool to put it on the wall of my lab and write things on it by the internet.  Photo below.  I'm in the process of reverse engineering it and connecting it up to a micro to display some messages.  I've found a couple of things I could do with a little help on.

It seems to have a control board, then a load of row driver boards, which drive a line of LEDs all at once, then the boards with the LEDS attached are column drivers.
They drive 8 leds at a time from a DFF which is in-turn driven from a serial shift register. The column driver boards are connected to the LEDs which are arranged into 5x7 matricies

The column driver is here.  Can anyone confirm:

1 - The chip marked HC574 - I assume this is a cheap generic 74HC574- is this likely to be the case?
2 - The long yellow things - My guess is that these are resistor packs being used to limit/control the LED current.  Is this what resistor packs used to look like?

[P_Doped]

2 - The long yellow things - My guess is that these are resistor packs being used to limit/control the LED current.  Is this what resistor packs used to look like?

These are SIP versions of resistor packs where there are N-1 resistors all connected to the pin with a dot on it.  They are used when you need pullup or pulldown resistors.

[David_AVD]

These are SIP versions of resistor packs where there are N-1 resistors all connected to the pin with a dot on it.  They are used when you need pullup or pulldown resistors.

The SIP versions are also available in "non-bussed" configuration. eg. 4 resistors end to end in an 8 pin SIL package. An odd number of pins should exclude that possibility of course.