Rad leak

["Lino M. Valadas" <valadasl@osha.igs.net>]

Hello again,

My Rad is leaking at upper RHS corner.  Looks like the plastic is cracked.
The car is an 86 5ktqw.

I have a few questions.  If anybody could answer them it would be greatly
appreciated.

1. Should I replace it with a copper one or stick to aluminum?
2. What should I expect to pay for this rad (the replacement)?
3. Are there any things I should whatch out for while replacing it?  It
seems like quite a straight forward operation from the Haynes Manual point
of view.
4. The core seems to be in great shape.  Can the plastic ends be replaced?

Thanks

Lino