GM / General Motors: aftermarket radiator (plastic tanks/aluminum core)

Could someone please comment on the use of aftermarket radiator with
plastic tanks/aluminum core? I am considering imminently replacing
the radiator in my 1988 Olds Cutlass Ciera (2.8L mpfi/auto/fwd) which
I have been driving around with a leak for a few months. My question
would be whether aluminum core is adequate from heat removal
standpoint. Further more the manufacturer of this item indicated the
tank is made of plastics (I presume they meant the two main fluid
chamber on the sides where the exit/entrace hose are located), is this
any good?.

By the way, what did they meant by Type Mount: C oil cooler 1-1/2"
as far as I know my current rad has no oil cooler, instead it has two
tubes running into the transmission (trans cooler??)

I search their website (www.transpro.com) and eventually found the one
for 1988 Olds Ciera with 2.8L VIN W. Shown below. Thanks for you
comments.

http://webbase.transpro.com/lookup.php?partnum=433738&acctname=icarz&acctpw=sm artlink

Hello, why replace the the whole Radiator just replace the cracked tank.
It cost alot less, if you have a radiator shop around you that does
replace just the tank. I had mine replaced 3 yrs ago. Its worked
perfectly ever since. it a waste of money to replace the whole radiator
just for a cracked tank. Your just making the Auto Dealers, and Auto
Parts and wrecking yards richer. Not Me. HaHaHa. Hope this Helps