I'm interested in hangining my exhaust in an all-bolts configuration on the
rebuilt 2.1 I have going into my 1.9 van.  I plan to use a4 stainless 8x30
bolts.

(My reasons are: it seems both studs and bolts have benefits, but they are
maximized running all-studs or all-bolts.  E.g., with all-studs, none of
the holes have thread-wear, with all-bolts, you can do a head gasket
without removing exhaust.  All-studs are not an option for me since the 1.9
water pump is in the way of removing the headers when using all-studs.)

 My plan is to remove the studs was just to tighten two nuts against each
other on each stud and use that to twist it off.  I'm guessing that this
should be easy since the heads (and studs) are brand new.  Do I need to use
a stud puller instead?  Or should they come out easy with the double-nut?

Thanks,
Wes