well here's 954K20_SI's valve cover
and here's his post about installing the valve cover
Swapped a Type-R motor in my Si..check it out.
he really didn't give a direct answer about what he did with those bolts. try PMing him and asking what he did. but let us know when you find the answer because i too plan on swapping my valve cover for the DC5R sometime in the near future.
good luck