Do I need new gaskets and seals when I install this?

Yes. Always use fresh gaskets between the manifold and cylinder head, and new O-rings on all coolant fittings. Reusing old seals will leak. Gaskets are sold separately.

Will this bolt directly to my engine without any machine work?

It mounts at factory bolt points with no drilling or porting needed. Your existing fasteners and vacuum/coolant lines will connect without modification.

What tools do I need to swap this out?

You'll need basic hand tools and a socket set. Refer to your vehicle's service manual for torque specs and fastener locations—every year has slight variations in harness and fitting placement.