[deezee]

You'll also come across some right awkward sizes in the build. Propshaft to Rear diff has some horrid sized bolts in it. The bellhousing to gearbox are fine threads. Flywheel bolts are specials that you have to change if you take em off.

As a rule of thumb I use a nyloc on any bolt that sits on a moving part I.E. Suspension. The rest are just torqued up right, same as a production car. I mean, how many nylocs do you come across on a production car?

Edit: I'm lucky enough to work with a fastener company at work and as a result can pick up most any bolt size (imperial or metric) without a minimum order quantity.