The female torx bolts are head bolts, the male torx bolts are head bolts,they need binning cos they are stretch bolts ie single use,you could replace these with a ARP head stud kit,replace the con rod bolts with an ARP kit as well.It looks from the photos, that you have an early cambelt set up ,so the bottom end may have forged pistons,but the head is a late dispack casting,as this engine seems to me to be a bit of a mix and match,I would make sure you can identify all the components and make sure they are compatable before you put it together,for example,with the cams measure the lift to make sure you havn't got a set of LET cams.The bolts for the main bearings,big end bearings ,head,crankshaft and flywheel are stretch bolts and should be renewed on assembly.The XE on 45's should make around 190 BHP if well set up.