Cob said:If the rads connectors are beside each other then it doesn't matter. If they're at either end, then have the water going in the top and out the bottom. The blocks don't matter.
Cob said:As for filling it, just fill the res, switch everything on, and keep pouring in the coolant until it's full. Then bleed it.
Cob said:topping up the collant as you go
Cob said:Well firstly are you going to use a t-line to fill up the system or will you have easy enough access to your res to be able to top up the coolant level?
Cob said:In that case everything will be pretty simple. Fill your res and turn on your machine. The pump will suck out the coolant out of the res, thus the need to keep filling it up until you can get no more into it. Then, while it's still running, shake the radiator and let the trapped air escape from the open res, topping up again as the coolant level falls.