Well I have the entire cooling system off. Radiator, Water pump and hoses...all to get to a burst Bypass hose.
My question is , What Antifreeze should I use? Mixture Ratio? etc.

Thanks. I'm hoping my parts arrive Monday or sooner.

 

MINI brand antifreeze mixed 50/50 with distilled water.

Dave

 

For a 'classic'

I believe if you do research as I did you'll find that any decent a/f is ok - I use Prestone - but keep your concentration to 25% or less.

My last flush I used 'extended life Prestone' at 25% with just an ounce of water wetter.

Many say these beasts run best on 100% H2O but then you miss the corrosion protection.

While you have the rad out - FLUSH EVERYTHING - and then flush them again!

 

I live in a hot climate - lowest temp is around 28 DegF, highest is 120 DegF (right now actually). I also run my car in National Auto Sport Association track events a few times a year which means I really shouldn't have antifreeze in my coolant system.

With that in mind, I put in 1 water-wetter bottle and the rest distilled water. No antifreeze. As CaptBJ indicates above, no antifreeze promotes corrosion, so I have to flush at least once a year. The water-wetter decreases surface tension on the walls of the block and cooling system so that air bubbles don't form. Air bubbles cause hot spots that can cause cooling problems that are difficult to resolve.

Just a suggestion - when you flush your system make sure you have the heater turned on so that you can flush out any old fluid sitting in your heater core.

Ok all that being said. That doesn't answer your question. If I lived where you live, I would use a name-brand coolant from any parts store, mixed 25% coolant to 75% distilled water. Distilled water is VERY important since it doesn't have any minerals in it which would help kickstart corrosion. Make sure you replace the radiator cap with a good cap that won't leak. Leaking caps prevent pressure buildup ... increased pressure means the coolant system can work more efficiently.

Have fun! You picked a fun project for sure.
Jeff