94 firebird, lt1 engine is knocking now when drove other day, tranny is good but will need engine work has hot cam, headers, bbk throttle body, cold air intake, built 4l60e tranny with torque converter 3000 stall, 2 1/2 exhaust pipe with cuts outs behind the header, Hooker's muffler, torque arms, summit racing wheels, skinnys up front, The car will need to be painted and interior needs some work, body is straight no dents ready to be sanded and painted, will need to be towed if bought, it starts up but knocking as if may be connecting rods not sure have not check what's going on selling as is..clear title in hand