If it is a 81 and up center bolt valve cover motor with , fuel injected TBI, or TPI, then they are supposed to run hotter. But at 225 on this style engine the external fan is supposed to kick on and cool it down to about 205, and not continually run at 225. If the motor is a pre 81 with valve cover bolts on the outer flange, then 225 is warm and even 200 is considered about as hot as you would want it to stay at on the pre 81 350 carbed motor.