4 row radiator

You scared me so I went out and looked at mine. I also believed that extra cooling would be better, so I bought a 4-row, from Classic, for my 318, but I haven't installed it yet. So I measured the distance from the radiator mounting flange to the fins (at the fan) on the factory radiator. The distance was 2.75". On the Classic radiator, the distance was exactly the same. So more fins did NOT encroach on the distance to the fan on my replacement.

What is distance from flange to fins on both your original and new radiator? Is there that much difference? You ordered the part number that Classic recommends in their catalog. Call them and ask about it.

Your picture clearly shows that the front-to-back distance of /6 is longer than a small V8, and you have less room at the fan.

I can't comment on the transmission line fittings, because I haven't gotten there yet. Good luck.