I have no seal between shroud to the radiator or between the radiator and the condensor (1" gap) except the flaps at the top.

Can I use fire proof foam strips to seal the air flow or do they make somthing for this?

Trying to direct the flow through the radiator and condensor only.

Any pic's of what you have used?

 

Speak of the Devil.
I just had a few cracks fixed in my radiator, picked it up from the old time radiator shop and put it back in today.
My '71 has seals between the radiator and core support on the sides and there are rubber seals that glue to the top and bottom of the radiator, also has those top side flaps too.
The shroud fits pretty tight and I don't think it would do much having a seal between it and the radiator? The major thing is to pull or push the outside air through the radiator and not have it go around it or be pulled in from the engine compartment. A seal between the condenser and radiator wouldn't mean much because it's on the outside. The condensor may restrict the flow too much if the air had to go through it only but who knows. Wouldn't they have put seals there if they were needed? Condensors have tons of aluminum fins and radiate pretty good, they may like having the flow all the way around them.
All I know is the more places for the radiator to pull cool outside air from the better IMO.

 

Why not use the correct parts? Both the inner compression seals and outer flaps described by BlueVista are available (reproduction). I can't remember where I got mine; I'd start with Fusick. The assembly manual shows how it all goes together.

 

I should have used Masticated Rubber, google it to find a supplier. You can find it. I used a different product that works fine, but it does not look original. The minimum was $40 for a sheet/roll. It was more then enough. I think the Masticated Rubber is about the same price.

 

I had one of my rads re-cored for the '68 442 and the upper and lower channels are inverted, so the original rubber seals won't work so I used plastic foam pipe wrap under the rad and at the top to fill the gap...works OK for me

 

Scrap door or trunk weatherstrip will work - just stuff it in there.