LOL, i'm confused now too. The wastegate is like a trap door in the turbine housing (exhaust side) that opens and allows exhaust gas to bypass the turbine wheel, regulating the amount of boost the compressor side makes. A BOV is a valve that is between the turbo and the throttle body that when the TB slams shut (between shifts usually) yet the turbo is still cranking out boost. Instead of a big pressure spike bouncing off the TB and hitting the turbo... not good for the turbo, and slows it down big time which makes it have to spool back up for the next gear.... this valve opens and bleeds off the pressure. True, you do not NEED a BOV.. and ive never heard of anyone controlling boost with a BOV. It would have to flow TONS of air, and meanwhile the turbo would be spinning like mad and be way out of map.

So in reply to the question... i have both a wastegate and bov. Both are hooked up to seperate vacuum lines into seperate barbs on my vacuum manifold. Its not as critical to have them isolated from each other. You definatly want to keep the FPR(s) and MAP with their own line though.

 

ported head & ported 2-pc intake & ported Peters exh manifold installed - check
0.20" head spacer installed - check
52mm tb - check
cam installed - check
adj cam gear - check
timing belt back on - check
dist back in - check
vacuum lines hooked up - check
3/8" fuel return installed and hooked up - check
exhaust hooked up - check
oil changed - check

Still on the list:
Need two more 3" mack daddy IC pipe hose clamps
need to make my new intake piping hook up to the filter
put together a valve cover breather system
start engine

 

it just might be running then. But not nearly tuned