G'day Kodez23 
 
 
 
Although my 2a GS has extractors,I have a flange joint to the intermediate pipe,(easy pipe removal for head repair etc.)the inter pipe turns about 25 deg,then up over the front gearbox X-member,close to the floor,(heavy rubber conveyor belting recommended for mats)then straight through the X-member holes that are close to the chassis side rails, I have my muffler mounted between these, then out to the rear one doing a 45deg turn to the right and exit behind the right rear wheel,if it is a genuine military 2a chassis there should be exhaust pipe mounting brackets welded to the side rails,the centre mounted muffler(free flow) gets it up out of the way and protected by the chassis, I didn't have any pipe when I got mine it just hung down, but I got a piece of fencing wire and bent/traced where it should go 
 
 
 
NOTE: I would recommend that you fit a 2 inch (50mm) system as by reducing the exhaust size was the way that english manufacturers reduced BHP to suit UK rego costings. and the increase of pipe size will make the motor breath better, "Sonic" used to mamufacture extractors for 2.25 litre Landrovers,
 
hope that is of some help
 
cheers
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