Whats the 5 speed from ? KE55 and it'll slide in, KE70 and you'll have to cut the trans tunnel closer to the hand-brake, use the cross-member from the ke70 and place something between the x-member and car body so that the x-member will be about 1" lower.
http://www.rollaclub.com/wiki/index.php?title=Series:K/Model/KE50/KE55/Ke55_Round_Headlight_Conversion
Its for converting the square lights to round lights so it'll be the reversal for round to square.