Are the 2wd 4 pots a straight swap for the 4wd front caliper?

 

Afraid not. Different offset I believe. Definately cannot just swop them.

 

Reason why I'm asking is I've just picked up a pair at an auto jumble sale for 20 euro I dont think the guy knew what they were
To fit them would I need 2wd discs as well? and if so would the standard lattice wheels clear the calipers?

 

I don't think you'll be able to fit 2wd discs onto the 4x4 hubs - the disc will foul the steering arm. You may be better off just selling the calipers on - at a profit of course.

 

They may go on with 2wd discs and tappinng the lug holes to take bolt.
Se if you can get/borrow a set of 2wd discs to see if it all lines up, may need washer under lug to space slightly, but should go straihgt on when hole is tapped.
tabetha