Sure. I am not willing to try anything untested. But as far as I understand the .63 is the one that JW240 is using in his setup.
I have only driven various cars with the .48 housing..
YBG 4x4 Cossie
2,3 8v Volvo--several
2,3 8v Ford Lima in Us Sierra
And reports from a number of others with B21T, Mitsubishi 4G63 Galant, USDM Misterbitchi Eclipse with 4G63, Volvo 2300 16v
All report a motor that pulls HARD from 2200-2300 rpm and if the motor has the ECU for it, revs past 7000 happily...
The .63 turbine housing in this design was OEM on first 2500 Escort Cosworths for use in Group A rally....which mandated the turbo Ford intended to use on the rally cars in International competition must be on the base homologation cars...so they used TB3403 with the .63 exhaust housing....
But bear in mind that that was so its there when car is in Group A trim...which meant aggressive anti-lag giving just short of 1 bar boost at idle (and idle was around 1400 rpm) and a VERY close ratio 6 speed versnellingsbak so they weren't worry about the car falling off boost on gearchanges because the rpm didn't drop more than 800-1000 rpm, and anti-lag...
The base model "large turbo" Escorts were the slowest stock Cossies because big A/R lag..
I'm guessing but I'll bet you don't have plans for a very close ratio box or aggressive anti-lag. If my guess is right, I would suggest the .48 housing..
And that's assuming as well that this is for a road car, not a track car.