[OrrieG]

When I was running my stock heater I took the dimensions down to my local radiator shop and got one that was the same size. I modified the fittings to get rid of the internal control valve and put in an inline one. Up here the climate is either you need it or you don't so switching it a couple of times was not a big deal. If you have deluxe controls you could get a longer cable and run it to the inline valve. Get fancy and you could find one with a solenoid and use a switch inside too.