Watch out for the (lack of) quality in some currently available water pumps for the slants! Robsport do a decent kit as does Tony Hart at HRS, but I'll leave it to your imagination how bad was the exchange pump I was presented with from a certain large, East Midlands-based suppliers recently. I wouldn't have dreamt of crediting that shower with the gumption to supply something that worked and fitted first time out, but this was for a third party who'd already placed the order.
R****** by name, R****** by nature!
As an example of how little one of their counter staff knows, his advice when I mentioned that the pump had been fitted by someone who's only done around a dozen of these recently with no trouble whatsoever and its cover shimmed correctly but coolant was still coming from the slot on the side of the block:
"Can't you fill the slot with sealant then?"
Bunch of chiselling twunts they are! Best thing you could do is fit new seals and impeller
(buy that from Saab as their unique 6 vane one fits a 12 vane Triumph cover and affords better flow with less risk of cavitation than the 12 vane BL one, so a guy with a lifetime's Saab experience tells me) yourself. Be careful pulling the cage and make sure the assembly is all seated properly in the block before you shim the cover, the rest's a piece of cake.