My old rad was looking too tired to run 11's so I stepped up to an alloy unit.
It's an AFCO direct bolt in unit, very good quality, my only comment was that the bottom outlet is too long and angled upwards. I had to cut and shut the hose to make it fit. Everything else was a direct bolt in, it uses the standard mounts and rubbers.
Here is the link:
http://www.afabcorp.com/AFCO_Dynatec...chevy-full-rad
I got mine for $345.99 on e-bay.
The core is the same dimensions as a SBC copper rad.
So how much weight does it save?
The AFCO weighs 15.5lb when empty.
Full the AFCO is 27.5lb.
My old rad for a SBC weighs 21.5lb empty.
Full it weighs 31.75lb.
As you can see the Alloy rad holds more water.
So a net saving of 4.25lb.
Every little helps, but unless your rad is shot like mine the money could be spent better on something else.
Neil.