Finally got my radiators in! Any advice would be helpful!!! 
I have done this on my Mr2 its not as easy as you first think, so I hope this info will help.
get yourself a MR2 fill neck they are located in the engine bay and are plastic, being your using a V8 u might want a higher pressure cap than the Mr2 one. the filler neck needs to be the highest point of the system to help the air escape, I stress the highest point nothing can be higher no hoses over flows NOTHING... or you will never get flow with the air locks you will have. now the caps you have on your new radiators need the valves removed, usually you can do this by cutting the centre rivet holding the spring and valve in place, in the end you should just have the cap and rubber seal that seals between the filler neck, if you cant do this with the caps you have you can find valveless rad caps on eBay. put those back onto you radiators never to be removed again. now you will need to mount the radiators onto your car, and keep them lower than the filler neck you installed from the Mr2. its up to you which radiator gets the hot water first, on the Mr2 I used the left side, so you will run the the hose that your engine used for the top hose to the top connection of your new radiator, this is also the radiator you use for the fan temp sensor ( you can add two sensors so that the other opens your Bat wings

, the bottom hose of this same radiator will attach to the top hose of your second radiator with a metal pipe, but keep the incline as smooth as possible, I found it was too hard to remove the air lock if you had a large incline and the water wouldn't pass through. now the top hose of your second will run back to your engine. try not to have any hoses or pipes higher than the radiators and keep inclines smooth to avoid air locks. fill up the system, start the car without the radiator cap on, and run to your fans turn on, squeeze hoses to help push the air locks out while its running. turn off the car and let cool, repeat this 3 or 4 times you will see the air bubbles popping at the filler neck, its also best if you cut a soda bottle in half's and use this on your filler neck to get the top up water as high as possible this will help remove the air. hope this helps.