LT77 oil pump

[Finn tr7v8]

Hi all.
The gearbox in my race car needs a rebuild but there seems to be two different kind of oil pumps in those boxes. Like these;

http://cgi.ebay.co.uk/Rover-LT77-SD1-Gearbox-Oil-Pump-Kit-Thick_W0QQitemZ1400
91223401QQihZ004QQcategoryZ27382QQcmdZViewItem

And

http://cgi.ebay.co.uk/Rover-LT77-SD1-Gearbox-Oil-Pump-Kit-Thin_W0QQitemZ1400
91223419QQihZ004QQcategoryZ27382QQcmdZViewItem

The number in my gearbox is 19A0005817D which indicates that it is from SD1 3500 SE/VP model. It is a big bearing model but.....oil pump thick or thin???? And how thick is thick and how thin is thin??? If You can give Me some dimensions about those gears that would help Me a lot.  :)

Thanks;
Esko
Finland

[Finn tr7v8]

Links.....again

http://cgi.ebay.co.uk/Rover-LT77-SD1-Gearbox-Oil-Pump-Kit-Thick_W0QQitemZ140091223401QQihZ004QQcategoryZ27382QQcmdZViewItem

http://cgi.ebay.co.uk/Rover-LT77-SD1-Gearbox-Oil-Pump-Kit-Thin_W0QQitemZ140091223419QQihZ004QQcategoryZ27382QQcmdZViewItem

Sorry  ::)