imported cultus is 94 model ... from pshwer, u can easily convert efi cultus, with bolt to bolt auto gear...
for old cultus, u can go for efi 1000 cc or 1300 cc bolt to bolt engine swap, thn u can covert it to auto ...
for simple cultus, auto gear bolt to bolt is not possible ... yes alteration is possible, but not recomended ...
best is with swapped efi engines of 1000 or 1300 cc ... or with new efi cultus ...