273 to 340 swap in 64 cuda auto advise needed

OK it's been a while since I replied on this post. The day before I got the rebuilt '71 340 motor from the shop. My wife and I got t-boned by a girl on a cell phone who ran a stop sign while we were stopped dead in traffic. 23K worth of damage to my car. The body work is now 40% done so I started installing the 340 before they finish the car.
I am going to use the stock 273 logs for ease of installation for now. Motor mounts were purchased form Norm's speed shop. I went with an Edelbrock aluminum intake, and Edelbrock AWS carb.
After removing the radiator, it was a tiny Nothern radiator for a mustang mickey moused in. I am considering a 3 row champion CC1635. need to check the dimensions for fit up before buying. The radiator cap on the northern radiator slightly hit the hood when closed. I am going to start another post for recommendations on a radiator.