You can also check out the 5th Gen camaro exhaust manifolds if you have frame clearance issues. They tuck closer to the block and use 2 studs instead of three.
CLICK HERE
For my fuel lines on the Blazer I used some local parts store length of 3/8 hard line and used a 3/8 compression to -AN fitting for a short flexible line at the motor and the tank. Some years had systems that use a retun line with a regulator at the intake manifold. I lucked out with a 2005 motor and the regulator is built into the fuel pump module and uses a returnless single line up to the motor.