issues without stroking ? i thought these motors where fairly strong...... ?

Would the 2.5L 257 Motor, with the head work, bottom end work, cams, exhaust, fuel pump, injectors and tune be fairly bullet proof at 450hp ? im more worried about reliability then expense as id rather pay more now and it be reliable then less now and it breaking down and costing a fortune later.....

Anyone got any idea how much this cost me ?