Rover V8 thermostat - will this fit an SD1 3500?

[FlipFlopGriff]

Got a P6B V8 in the Land Rover but it has SD1 inlet manifold and rocker gaskets, plus 2 SU's (both from an SD1).
Would this thermostat fit as I don't believe mine is functioning:
http://www.ebay.co.uk/itm/Thermostat-for-TVR-Chima...
FFG

[FlipFlopGriff]

Thanks for the help. Just realised i'd got 2 x 74 Wahlers for the Tivs but not yet fitted so I'm ordering an 82 for the LR. Coolant pipes are hard so I need to find out what causing it but given everything else I'm finding not confident in the condition of the stat, especially with all the blue gunk around the housing so I'll change it and then check the water pump and hoses.
FFG