put all my car back together tonight new cometic gasket on only to find my headbolt washers are too big to fit the head

when burtons asked me what type i needed i didnt know so i knew my car is on a 2wd head (cos of thermostat bolts) so he told me i needed large washer head bolts so i got em.

i need small washer headbolts


why are there 2 types and what car used the larger ones.

just a lot of ballache for me