Slant 6 Turbo... Tight quarters. I could use some pointers

A remote idea not a bad idea works well on many applications. If you want to keep it in the dog house, I would get some more insulation and put in on the cover, the BOV doesn't blow off exhaust just air so that's not a issue, plus you can put that on either side of the turbo hot side( pipe off the turbo to intercooler) or cold side (after IC). Are you planning on internal waste gate or external? If you go external just run a tube off and under the cab or bed or put it back into the exhaust, I personally like the external wg and dump to atmosphere love the sound. Internal don't have to worry about it since the down pipe will have the opening for it into the exhaust anyways. Good luck with the build, that thing will run good once all said and done.