I am in the process of replacing the radiator on my 1956 Ford Crown Vic with 292-V8. I want to completely flush out the cooling system and drain the block by opening both drain cocks on either side. There will be no or very little liquid in the system. I want to refill the system with a 50/50 antifreeze and distilled water mix.

Do I need to put any 50/50 coolant back into the empty block before starting the engine or do I only need to fill the radiator initially and then start up and add 50/50 coolant to the radiator until full. I am afraid to run the engine with no coolant in the block. If I need to put coolant in the block, how is this done?

I got the car in an auction 3 years ago and know little about the condition of the thermostat other than it seems to be working ok. Do I replace it with a 160, 180 or 195 degree thermostat? I live in Louisiana - mild winters and hot summers.

Thanks in advance!

Danny