1st thing ......blowers are very cool.........and I agree with everyone else here.buy from one source.
I work for Evans cooling and have had many customers with new blowers on their motors and call to say the motors is running hot. The biggest problem I have seen is the tune-up.
I had a customer who did everything I told him to do and the motor still ran hot. So he said a friend of his had a chassis dyno. I told him to put his car on it and check the tune-up. Sure enough, at highway speeds, the carbs were leaning out making the motor run hotter. They fattened up the carb and solved the problem.