Vortec swap questions

[clampjockey]

I recently bought a 71 gmc with no drive train. I have a th350 tranny, going with either 3.08 or 3.73 gears (most likely 3.08), and a rebuilt 350 from a 72 impala, not bored. I picked up a second hand set of 062 vortecs and RPM intake. I have a 375hp 327 cam/lifter set. I am planning on doing this head swap shortly and want to know everything I need and should know before I start.
I plan on buying a new water temp sensor and getting it cut/threaded to fit the head.
I have a set of tbi valve covers and plan to buy gaskets for vortec??
Buying intake gaskets and bolts for vortec.
Rocker arms came with the heads.

My questions are:
Which head gaskets do i use? Do I order a head gasket for a carbed engine or a vortec? Are they the same?
Is there a certain thermostat/housing I should use regarding coolant bypass topic?
Can I use my headbolts from the old engine or do I need vortec head bolts?
Spark plugs for vortec engine??
If there is anything I'm forgetting or should know, I'd appreciate it being brought up. Thanks