I would find another engine.
look for a COMPLETELY 350 votec engine 96 to 2000. These engines came with factory roller cams and vortec heads.
These engine came with 285hp stock but a set of headers and intake/carb can make over 300hp.
change the cam, modifiy the heads (bowl blending, spring pocket/valve stem mods) and the engine can make 350hp and still retain low rpm torque.
check with used engine salvage yards. Should be able to get one for less than 750.00 and may not even need a rebuild.