Radiator interchange question

[78C10BigTen]

So im asking as im not sure. My 78 needs a radiator, and i have access to 2 original radiators. One from a 73 c10 and another from around a 77 c10, my question is being my truck was factory v8 and the other 2 trucks were factory straight 6 will those radiators work on my truck?

 

[Frankenchevy]

Are they physically smaller? If so, I’d look for a sbc, bbc or 6.2 radiator instead.

 

[78C10BigTen]

Are they physically smaller? If so, I’d look for a sbc, bbc or 6.2 radiator instead.

Im not sure, i havent got to look yet. They are an hour and a hlf from me so it may take awhile.

 

[RetroC10Sport]

You'll need to measure height, width and thickness. There were 2 widths available in 1978, 26" and 28" and several thickneses - 1-1/4"; 2" and 2-1/8"; the 28" that's 2" thick had 2 heights, 17 and 19" AND the 17" either had a heater hose fitting or not.