Thanks for the kind words guys, Im going to look at a friends F100 tommorow for a potential gearing swap, his is a '75 ex ambulance and has a 5 speed gearbox of some kind so if its ok and if the rear end ratio is higher then mine i will swap them over.
Continuing the radiator swap today i found that the stock top hose conveniently fit on the bottom of the new rad, just needed a lil extension to get it over the bigger inlet on the water pump (steel sleeve inside then hose clamp on top to hold it together)
Then went to the local parts store and found that the bottom hose from an earlier model Commodore was close enough for the top, i also noticed that there was no thermostat when i pulled the top hose off and the gasket was just silicone so i got both of them too. i had to relocate the coil to fit the new hose on as it wasnt quite tall enough but no biggie.
After getting it all together and filling it up (just tap water for now to make sure everything was good) i started it up and found that my oil pressure and water temp gauges work perfectly with the new senders.
Unfortunately the engine wasn't quite running right though, i thought i must be low on fuel so i babied it to the servo and filled up, but then it ran like crap still on the way back, coughing and spluttering and stalling
i opened the bonnet to figure out what the hell i did wrong and found out why there was no thermostat...
Stupid LPG system had completely frozen up, after a lil while warming the engine up and pouring hot water over the vaporizer to defrost it everything came good and there was hot water running though all the places where it should
After that i wired up 2 relays for the thermofans, the smaller one i hooked up to the ignition so it comes on when i start the car and the other i wired to a switch in case it gets hot in traffic or something:
Now i need to take it apart again and pull the thermostat out, paint all the brackets holding the radiator in, clean it all up and put it back together, this time with proper coolant (once im sure there are no leaks or anything)
Thanks for looking