ive been told by datsport that a 1600 will fit but just moves the motor forward a little but if they have one sitting there i mite just swap x members with them or just buy one

and motor spec
-L18 out of a 180BSSS
-fully re built head with new valves,spring,and k line valve guides, and ported inlet and exhaust
-1x733a reground cam (datrally cam)
-40 thou bored
-flat top pistons
-TWIN 40mm dellortos side draft carbys
-match ported redline manifold
-4.2.1 pacemaker extractors
-topgun leads
-oilcooler
AND
-adj cam gear

should be fitting up the motor in the next few weeks