I use a Flex-a-lite model 230(puller)with there thermostat and a Aluminium 960 radiator. I have yet to have any problems with the setup. The fans flow 2500 CFM and keeps it quite cool even with A/C on. I had used this as a pusher version first in the location where the intercooler normally sits. After switching to the newer 5.0 engine with shorter accessories I was able to put it behind the radiator with a notch in the corner of it to clear the upper radiator hose. You may not be able to use it as a puller if you have very small clearance as with an automatic trans install.