Ed if you can fit the 6 blade, curved tip fan in the space you have, that's probably the best you can do for a fan.

I agree with Cnut, you should go for a shroud too. There are shrouds available for the V8 radiator setup. You may have to cut on it to make it clear everything.

If that fails, get over the hangup of the radiator location and look. Put a crossflow and dual electric puller fans on it and enjoy your car.