[Sydney]

I have a 10 year old Shell Valley with a 351 w. I didn't want the pusher fan setup because I wanted to add the twin fans in the front. Basically I made a new lower radiator support bracket. What I did was to get a big puller fan and mount it on the rear of the radiator and moved and shifted it around until it fit with the fan on. This was a pretty big job, it involved some considerable cutting and shaping of the fiberglass around the radiator. Also fitting around the hood hinges was an issue. After I got it all to fit, I blocked it up and made a new lower bracket to support it. I was able to reuse the upper support by modifying it a bit.

I think the biggest thing is to have a shroud between the top of the radiator and the nose so that all of the air coming in the nose goes through the radiator. I made an aluminum trim piece that bolts to the top radiator support that accomplishes this. It is a pretty rare day that my fan even comes on. I think my fan switch is 207 degrees and my thermostat is a 195 degree unit. My engine runs between 185 and 200 degrees most all of the time.

Dominik is right about the initial timing. On of the things I have to do to pass state emissions testing is to retard the timing 10 degrees. It is amazing how much hotter the engine runs. I have to have all the fans running the full time at the test station just to keep the engine at 215 degrees. I hope that gives you a few ideas.