some questions before I make some purchases

[nikwho]

Im building the '59 Apache. I just finished up my camaro ifs graft, stabbed my 350/700r4 and fabbed up my engine mounts/tranny crossmember. I am making a purchase of some part to make a move on getting this thing back together.

I have heard guys say that they run a 22"x19" universal aluminum radiator from jegs. I wanted to know if this, in fact would fit well. I can fab up mounts. This is the radiator I intend to buy:
http://www.jegs.com/i/JEGS/555/52005/10002/-1

I also am purchasing a '70 mustang fuel tank and was planning on running this carter fuel pump:
http://www.jegs.com/i/Carter/180/P4594/10002/-1

I intend to buy these headers. They fit the '79 camaro subframe.
http://www.jegs.com/i/Hedman/500/68600/10002/-1

I also intend to purchase this transmission cooler. The size will work well in conjunction with the radiator to mount it.
http://www.jegs.com/i/Flex-a-lite/400/3826/10002/-1

You guys have much more experience with these trucks and im hoping you can tell me if im heading in the right or wrong direction.
Is this transmission cooler appropriate? I intend on installing it just in front of the radiator. Do you guys think that these headers are appropriate? As you can see, im on a bit of a budget. I'm trying to buy parts that will allow me to complete the build in a somewhat timely matter. Thanks for the input guys!