Fan thermal switch

I only have one place to locate my temprature sender and thats the intake manifold. I also want to use a thermal switch to turn on the electrict fan. Here's the question: There are to ports on the water pump
(SBC) one on the top of the pump and one on the left (as viewed from front). These ports are for a heater which I will not use , can I put my switch in one of these? If so which one?
Thank you for your reply's
Terry aka dirt t

 

there are no holes in the heads?

 

There are no holes in the head's.

 

I think I would try the top one .

 

I did not want to solder a fitting in the radiator.The wiring is already at the motor.

 

Why not use a centech switch from Speedway. It uses your gauge sender ,if its electric,and no other sending unit is needed.

 

You've peaked my interest.....What kind of heads do you have?

 

Ok forgive my ignorance but what SBC heads don't have holes for the temp gauge in them, that is a pretty common place to locate one.

You can put a t in and plumb your temp gauge and your fan switch in there. I am not sure how accurate your water pump would be, it is going to be pulling water from the radiator and not heated engine water.

 

You might look for a thermostat housing w/a bung in it , then put your gauge sensor in that & use the intake port for the switch..

dave

 

Here's photo's. I like that thermostathousing with a bung Idea.

 

Thank's dave that's the type of answer I am looking for.
Terry

 

Why not just use a sensor that inserts between the radiator fins?

Something like this...

http://www.amazon.com/Derale-16738-Farenheit-Electric-Controller/dp/B000CN4XWQ/ref=pd_sbs_auto_3

 

with the probe type insert from the back side of fins as that reads a hotter temp......

 

I use a fan switch that slid into the radiator fins on my first model A. It worked great and was easy to install. Just food for thought.

 

I all ready have the switch and was going to install on motor but not enough holes in the motor.

 

I probably got one around here if you need it.

 

I use the sensor that screws into the radiator drain pet**** with an adjustable thermal switch that along with the thermal wire are mounted out of sight. Works great!

 

What pipe thread is it ? My switch is 3/8 pipe.