32 ford rearend change?

[choptop30]

Building a 32,
In the middle of cutting down a 40 rear-end to put under the stock 32 frame.

I was wondering if the stock late 32 rear-end (scalloped tube) with spring and other misc. related parts that I have would be a better choice if I just swap out the mechanical brakes for later hyd. brakes and use it instead.

Will be running a warmed over flathead and stock three speed.

Any guidance would be greatly appreciated.

Don