C&R is another excellent choice. Good enough for the top NASCAR, CORE, SNORE, SCCA teams to use...
I steered CarlC toward an integral heat exchanger radiator for his '68 and its install is shown on his web-page:
CarlC's webpage
I believe he paid around $650 for this component... and even with the pounding he can dish out at "Streets of Willow" on a 112+* day... the engine temp never went over 195* cooling both the engine coolant and engine oil at the same time. Dollar for dollar... that is the best money spent for a cooling system and tops the function over form category.
The Ron Davis equivalent to this in capacity and performance would be $1200.00 plus...