Early A Radiator help

OK since I have a 416 in the 64 Dart and my old radiator is tired and also made on the low end side for cooling this beast I need some input from what others are doing or have done. Has any tried one of the 70 cores to see if they bolt right in? Maybe I can take one of these or get a custom 4 core in this design if it bolts it?

So 1st off I was wondering if I was to keep it fairly stock I noticed most parts companies do list 70 and up and not the early cars for radiators. This is mostly OK since I have the later style water pump which matches these cars. I am just not sure if the radiator from a 70 dart will bolt right in or not? I have below the specs and pics from HD and non HD offerings for a 70 Dart. The sizes are very close to what the 64 has now. Only issue I see is they are all still 2 rows and I would prefer I think a 4 core, or is it much better to go with aluminum?

1st picture
Make: 70 Dart 340 or 318 with HD cooling CHRYSLER
Core Size: 17 x 22 x 1 1/4
No. of Rows: 2
Tank Inlet: 3 3/8 x 21 5/8
Tank Outlet: 2 x 21 5/8
Inlet Connection: 1 1/2 Top Left
Outlet Connection: 1 3/4 Bottom Right
TOC: 10
Construction: Copper Brass
Mounting: Front Flange

2nd picture
Make: 70 Dart 318 and non HD cooling CHRYSLER
Core Size: 17 1/4 x 18 5/8 x 1 1/4
No. of Rows: 2
Tank Inlet: 2 7/8 x 18 1/4
Tank Outlet: 1 3/4 x 18 1/2
Inlet Connection: 1 1/2 Top Left
Outlet Connection: 1 3/4 Bottom Right
TOC: 10
Construction: Copper Brass
Mounting: Front Flange
Comments: Sensor Fitting on Top Tank

thanks!

433526.jpg

433409.jpg