Small vs Big

[lower50's]

For my '52 gmc I used a big front end 9700.
I believe the cab is all the same but what about the front clip?

Does anyone know what the differences are between the 1.5t and down vs the 2-3t front ends?

Here is what I have found out so far:
A normal chevy fender is very close to same length, mine was about 2" wider from cab forward.
My fenders are taller even tho I cut 3" off the bottom.
The wheel opening is for a 20" truck wheel.
As for wheel base mine is 120" with a 80" long box. A extended cab short box s-10 frame I believe will work.
The frame web was about 10" and about 1/4" thick steel.
The hood is longer but I'm not sure where and how.

Here are some questions from jkeating1
I know the fenders and hood are different, but in what ways?

I know the grille bars are spaced wider up-and-down, but is the grille width the same?

It appears the fenders drop lower below the cowl, but is that and the size of the wheel opening the only difference? Are the inner fenders longer?

Is the "web" of frame itself taller--from top to bottom of the frame rail? I mean, are normal aftermarket front IFS crossmembers out of the question for 6400 front rails?

Thanks guys any help would be great.