If it was a remote tank/tankless engine it did not get the spacers from the factory, and yes it would then also need 2 shorter headbolts like the rest of the bolts are around the left/pto side of the head.
for example, this is a factory slanted HS50 engine that has not been opened up/altered..........yet. Fingers crossed it was not used as a dust Vacuum when it was on the bike, will know in a week or so when it arrives :thumbsup: