Installed a ZZ4 SB engine into my 68. I installed a BeCool BB radiator,one reason being that I don't use water in my coolant...just 100% ethylene glycol. No hose problem really. I bought some flexible corrigated metal radiator hose from Summit. Since I had installed a GM Performance Parts Catalog Serpentine kit in the 68, I needed the flexible hosing to fit to the intake manifold housing. As I remember, the lower radiator plumbing used standard rubber hoses.

A caveat. I used an aluminum Billet Specialities thermostat housing. I was before installation I noticed the Billet Specialities aluminum thermostat housing internal passage was way grossly constrained. I used a grinder and probably easily increased it's internal passage way by 100%. If I hadn't done that I'm sure I would have had a heating problem.

I get a lot of rubbish about using pure ethylene glycol. My 68 has not seen any water since ~1972. My DD 97 Tbird and my wife's 95 DD Cadillac Northstar engine all have 100% ethylene glycol. Both DD cars have not seen water since new. There's absolutely no water corrosion with pure ethylene glycol. My ZZ4 with a BB radiator on pure ethylene glycol runs colder than a witch's tit. It will not overheat in the occasional hot weather here. Al the WWII coolant cooled fighter plane engines used pure ethylene glycol coolant...no water. Works for me.

 

Isnt that what you made me?
My car came small block now it's a bb
It is a wonderful work of art, many thanks for dealing with me....

 

I wanted to PM you about the radiator, but I don't seem to have that option. How can I talk to you about this privately? Like everyone, I'm looking for a deal and I want the 1 1/4" tube core. Also, I may want a radiator with a waterneck vs using the surge tank.

 

Tom, I have decided to buy your 1 1/4" core radiator. Are you planning another CF group buy deal anytime soon? 15% off and free shipping would make it worth waiting for.