Okay so I got an engine rebuild on my 94 chevy 350 since they found play on my crank, which was causing a mess of an oil leak, so they put flat-top pistons, bored out the block .40 over, and an elgin prostock cam, lifters&springs, heads got machined as well, pretty much the entire rebuild on the motor, guy said it should all work fine with the TBI, with that being done though since I am making a more performance engine, would I need a tune or would it run fine like that, I did replace the injectors, fuel pump, put a tb spacer, injector spacer, longtubes, dual exhaust, and cold air intake on it, new ecm and entire engine harness, and entire ignition system is new as well